"As well as enhance problem solving and critical thinking skills" is a sentence fragment because it is missing a subject. "As well as" is not a subject and does not do the action of the verb.

"After I read it" is not an independent clause, and it is being used as one, because it is forming the second half of a compound sentence. Compound sentences can only be constructed out of independent clauses that could each make sense and be grammatically complete on their own. So, to fix this error, we need to combine the two sentences into one, so that the prepositional phrase "after I read it" is part of a complete independent clause. The answer choice changing the sentence's period out for a semicolon does not solve the grammatical issue at all, so it cannot be correct. The answer choice that introduces the phrase "I have understanding that it" is unnecessarily awkwardly phrased, so it can't be correct either. The answer choice that uses "and" to connect the two sentences might look like a potentially correct answer, because it is combining the two sentences into a compound sentence, but "and understanding" merely extends the prepositional phrase "after I read it" into "after reading it and understanding it to be much simpler than I had initially thought." So, it merely exacerbates our initial problem, because the second part of the newly-created compound sentence has no verb. So, the correct answer is "Your paper initially seemed very complex, but after I read it, I understood it to be much simpler than I had initially thought."

"The best hunters" is the error here, making this a comparative error. The correct word would be "better" here because the sentence draws a comparison between two groups—females and males. Whenever a comparison is drawn between two items, it is correct to use the "-er" form of the word; this is known as the "comparative" form of the word. Whenever a comparison is drawn between three or more things, you use the "-est" form of the word, known as the "superlative" form. A comparison is used to compare one item to one other item; superlatives are used to distinguish one item from many other items.

This sentence's error lies in the incorrect way in which it uses a semicolon to introduce a list. "Knit stitches and purl stitches" are the "two stitches" that the sentence introduces earlier, so a colon is the most appropriate punctuation mark to use in this instance. The corrected sentence reads, "Knitting may appear complex, but even its most complicated patterns can be created from a combination of just two stitches: knit stitches and purl stitches."

A comma should be used instead of a semicolon to separate the introductory phrase "without their best player" from the rest of the second independent clause "the team didn't have a chance of winning."

A semicolon is meant to connect two thoughts that are both independent clauses. However, the second clause here is dependent and is connected by the word "so." In this situation, a comma would be appropriate to link that subordinate clause to the first independent clause. So, the corrected sentence would read, "That book over there belongs to Eileen, so we should help return it to her before she needs to study for the massive English test next week."

A semicolon is used to connect two independent clauses. In this case, the phrase that follows the semicolon is not an independent clause (a complete sentence that can stand on its own), so the use of a semicolon here is incorrect. Changing the semicolon to a comma would correct the sentence's error.

A colon, not a semicolon, should be used to introduce a list of things. Semicolons are only used to connect two independent clauses, or parts of a combined sentence that could each stand alone as an independent sentence. That isn't the case in this sentence; "broccoli, frozen yogurt, bread, pork chops, and eggs" is not a complete sentence.

The sentence has two independent clauses. Each could be its own sentence: "I was going to go for a run today" and "the stormy weather caused me to postpone my workout." They are joined by a conjunctive adverb, "however." (Other conjunctive adverbs include "accordingly," "consequently," "hence," "moreover," "otherwise," "therefore," and "thus.") When two independent clauses are joined by a conjunctive adverb, they require a semicolon after the first clause, not a comma. The corrected sentence would read, "I was going to go for a run today; however, the stormy weather caused me to postpone my workout."

The semicolon used after "techniques" is an inappropriate way to introduce a list. To correct this error, we should replace the semicolon with a colon.