"Pacify" means make calm or bring peace to, so "calm" (here used as a verb) is the correct answer. To help you, "despise" means hate deeply, and "bewilder" and "confound" are synonyms which both mean confuse.

Something that is "luminous" is light and bright whereas "dark" is the exact opposite of "luminous." To be "enlivened" is to be awakened and to be "secretive" is to be hidden.

A "benefactor" is defined as "a person who gives money or other help to a person or cause," so we need to pick out an answer choice that is a noun, refers to a person, and specifically means "a person who gives help to a cause." "Donor," a noun meaning "a person who donates something, especially money to a fund or charity," is the only answer choice that is similar in meaning to "benefactor," so "donor" is the correct answer.

Something that is of "benefit" is something that helps; an advantage. To provide further guidance, an "obstacle" is something that gets in the way, which is also the same thing as a "hindrance;" "barrage means" to attack continuously; a "garrison" is a group of troops left to defend something.

A "neophyte" is someone who is a beginner or a novice, so "novice" is the correct answer. To help you, an "expert" is someone who has a lot of knowledge and experience in a certain area; "expert" is an antonym of "neophyte" and "novice." For further help, "intermediate" means middle or of a difficulty between easy and challenging. Finally, "cathartic" means healing due to allowing one to purge one's negative emotions.

"Credible" means believable or trustworthy. For example, a newspaper is credible if it has high reporting standards and rarely makes mistakes or reports inaccurate information. So, "trustworthy" is the correct answer.

"Beneficial" means useful or helpful, so "helpful" is the correct answer. To help you, "deleterious" is a synonym of harmful, and both words are antonyms of "beneficial." To further help you, "sarcastic" means humorous, ironic and not serious, and "suspicious" means doubtful.

The prefix "metro­-" means related to the city or to city life. A “metropolis” is a big city. To provide further help, we call the towns just outside a big city “suburbs.” 

If you connected the adjective, "pacific," with the Pacific Ocean, you made a proper connection, though it probably didn't help you with the definition, as all of the options could describe that body of water. More helpful would be the related words "pacify" and "peace." These could lead you to connect the word "pacific" with its correct meaning of peaceful and calming.

The Latin root "carn" means meat or body, so a “carnivore” is a meat-eater. A “herbivore” is an animal that eats plants (the root "herb" meaning plants); a “vegetarian” is a human that does not eat meat; and an “omnivore” is an animal that eats both plants and meats, the prefix "omni-" meaning all. "Voracious" means extremely hungry or fervent.