The noun "humanitarian" is used to refer to someone who gives to charity, donates large sums of money. Another word for a "humanitarian" is a "philanthropist." Additionally, an "academic" is a scholar, a professor, someone who studies for a career; "pestilence" is disease; a "demigod" is a lesser God in a pantheon of Gods; an "anchor" is an object used to keep things, like ships, in place and prevent them from moving.

The noun "delinquent" means badly-behaved individual, criminal, offender, wrongdoer. "Delinquent" can also be used as an adjective in which case it has the same connotation, it means (usually of a young person, especially teenagers) badly-behaved, likely to cause trouble. Additionally, a "mentor" is someone with expertise who guides someone who has less experience; a "savior" is a hero, a messiah; a "prosecutor" is someone whose job it is to prosecute criminals for crimes committed; a "vigilante" is an individual outside of the legal system who takes it upon themselves to prevent crime (the classic example of a "vigilante" is Batman).

The noun "pariah" means outcast, person banished or ignored by society. Additionally, "novice" means beginner; "expert" means someone who knows a lot about a particular thing, not a beginner; "intermediate" means neither a novice nor an expert, halfway between a beginner and an expert.

"Aboriginal" means someone who is native to a region, someone who is indigenous to a region.

A "person travelling" is a tourist or a traveler. 

"Captive" means someone who is physically prevented from leaving, someone who is imprisoned.

"Marauder" means someone who pillages, raids or robs others.

"Foreigner" means someone who is not native to a region, someone from a foreign or different country. "Foreigner" is the antonym of "aboriginal."

"Pauper" means a "beggar" or someone who is very poor.

"Dandy" means a foolish person or it means a man who is excessively concerned about his appearance and clothes.

"Philanthropist" means a charitable person, someone who donates money, a wealthy person who gives away money.

"Oligarch" is a dictator, a boss, or a tyrant.

"Clique" means a group of friends, an exclusive group of people, a clan.

"Vassal" means "slave" or servant; originally the word meant someone who pledges fealty to a lord under the Feudal system.

"Rogue" means a criminal, a deceitful person, a con-artist, a villain.

"Zealot" means someone who is extremely enthusiastic about a belief; a fanatic or an extremist.

"Vendor" means someone who sells goods, a merchant, a peddler.

"Theologian" is a religious official or a philosopher of religion. 

The correct answer is "disturbance." 

"Commotion" is a noun that means a state that is characterized by confusion and rowdy disturbance. 

"Labyrinth" is a noun that means "a complicated irregular network of passages or paths in which it is difficult to find one's way," so we need to pick out an answer choice that means something like "a complicated network of passages." While "puzzle" may look like a potentially correct answer, "puzzle" as a noun means "a game, toy, or problem designed to test ingenuity or knowledge," not necessarily a "complicated network of passages," so "puzzle" cannot be the correct answer. A "maze," however, is defined either as "a network of paths and hedges designed as a puzzle through which one has to find a way," " a complex network of paths or passages," or "a confusing mass of information," and because the second definition of "maze" is very close to the definition of "labyrinth," "maze" is the correct answer.

“Particle” is a noun that means “a minute portion of matter,” so we need to pick out an answer choice that means something like “a minute portion of matter.” That means that “pile” cannot be the correct answer, because “pile” means “a heap of things laid or lying one on top of another,” and “particle” is specifically only one thing. “Speck,” however, is a noun that can mean “a tiny spot” or “a small particle of a substance,” and because “speck” is the answer choice closest in meaning to “particle,” “speck” is the correct answer.

A "labyrinth" is a difficult maze.