An "adjunct" is a thing added to something to be supportive or complementary. The closest answer choice is "supportive." To provide further help, "disconsolate" means unable to be consoled, unable to be comforted; "dismissive" means ignoring, not taking something into account; "hubris" is excessive pride; "penitent" means remorseful, seeking forgiveness from God. 

A "symposium" is a meeting. Usually it is a business conference, or a meeting to discuss a particular idea. A "trial" is a judicial event specifically designed to assess guilt or innocence, while a symposium has no such goal. While an "agreement" may be reached at a "symposium" the two words are not synonymous.

A "gala" is a festival, a party, a formal occasion with entertainment and socializing. To provide further help, a "vocation" is a job; a "bulletin" is a posted public announcement; an "editorial" is an article in a newspaper in which the author expresses his or her opinion. 

"Panegyric" means a public speech praising someone, a tribute or eulogy. To provide further help, "tenet" and "creed" are synonyms; both words mean a fundamental part of a belief system; a "hiatus" is a break from something; a "connoisseur" is an expert.

An "aspiration" is a goal, a target, something you aspire too. To provide further help, a "hazard" is a danger; a "mirage" is an illusion; a "forte" is someone's strong suit; an "aspersion" is a verbal attack on someone. 

"Vigor" is a noun defined as "physical strength and good health" or "effort, energy, and enthusiasm." So, neither "exhaustion" nor "illness" can be the correct answer, as each is an antonym of "vigor." "Intelligence" cannot be the correct answer either, as "vigor" has to do with "physical strength and good health," not anything related to the mind or intelligence. "Vitality," however, is a noun defined as "the state of being strong and active; energy" or "the power giving continuance of life, present in all living things." Because "vitality" is the answer choice closest in meaning to "vigor," it is the correct answer.

An "accolade" is a form of distinction, recognition, or strong praise. "Truculence" means a fight or form of aggression. A "quirk" is an oddity or strange way of doing something. "Intuition" means insight or instinct. "Delusion" is a misconception or misbelief.

A "quagmire" is an imbroglio or a bad situation. A "misanthrope" is a person who hates others. A "sovereign" is a supreme ruler or a monarch. A "patent" is a copyright on an invention or technology. "Myriad" means a lot of something.

Levity means humor or frivolity.

"Hilarity" means amusement or laughter. "Bewilderment" means puzzlement or confusion. "Acrimony" means nasty behavior or speech. "Alkaline" means being basic, not acidic (chemistry). "Quip" means witty communication or banter.