"Ultimate" is an adjective meaning maximum, farthest, or greatest. So the answer choice closest in meaning is "utmost," an adjective meaning greatest, highest, or most. Considering the other answer choices, "worst" is the antonym of "ultimate" and an adjective meaning bad or faulty, "helpless" is an adjective meaning weak or dependent, and "trivial" is an adjective meaning of very little importance.

The word “facile” means very simple or easy. This is closest in meaning to “simplistic,” which means very simple. To provide further help, “abhorrent” means grotesque, horrific; “grotesque” means horrifying and repulsive; “banal” means boring or ordinary. 

The word "benign" means harmless. The best choice is "harmless" because it is a part of the definition of "benign."

"Ornate" is an adjective that means elaborate, so the answer choice closest in meaning to "ornate" is "decorated," an adjective meaning attractive or ornamental. Considering the other answer choices, none are close in meaning to "ornate": "plain" means clear; "empty" means vacant or not containing anything; and "full" means complete or containing as much as a container can.

"Intricate" means complicated or complex, so "complex" is the correct answer. 

"Florid" is an adjective that either means reddish or more complicated than is necessary, so "ornate" is the correct answer. "Verdant" (lush and green) may look like a potentially correct answer because "florid" does derive from the Latin for "flower"; however, the modern meaning of "florid" does not have to do with flowers, so "verdant" is not the correct answer.

"Colossal" means very big, so the correct answer is “immense,” which means huge or severe. To further help you, "miniscule" is a synonym of tiny and is the origin of the word “mini;” "serendipitous" means unexpected good fortune; "circumstantial" means incidental or owed to specific circumstances.

"Minuscule" means very small, so "tiny" is the best match. "Vast" usually refers to areas of land or bodies of water and means very wide, so it is an antonym, or opposite, of "minuscule."

“Dormant” means asleep or in a period of inactivity, so "quiescent" is the correct answer, as "quiescent" means dormant or inactive. As for the other answer choices, “energetic” means full of energy; “domestic” means having to do with the home or tamed and not wild; “deplorable” means heinous and inexcusable; and “exhausted” means very tired or used up.

“Ancillary” means not necessary but supporting or helping the main part of something. This is identical in meaning to the word “supplementary.” As for the other answer choices, “complementary” means working well with something or provided for free; “toxic” means poisonous; “docile” means quiet and easily controlled; and "angular" means containing many angles instead of curves.