"Forlorn" meansmiserable or sad. "Ecstatic" is the antonym; it meansextremely happy. "Arrogant" meansconceited or full of oneself. "Informed" meanshaving knowledge or information regarding a topic. "Significant" meansimportant or noteworthy.

The word “sensational” does not mean merelyable to be seenor something related to being sensed. Instead, it meansastonishingand oftenshocking. When used in the latter sense, it has the connotation ofcausing scandal or moral judgment. The use of the word for “astonishing” can be seen in a sentence like, “The circus performance was sensational—filled with dangerous lions, fiery pits, and an eight-hundred-foot-long snake.” In the latter sense, one could say, “The crime was so sensational that its details filled the newspaper for three months.”

"Acrimonious" is an adjective that means "angry and bitter" and is used in particular of speech or a debate. So, we need to pick out an adjective that means something like "bitter" and refers to speech. While "well-spoken" might refer to speech, it does not mean "angry and bitter," so it cannot be the correct answer. "Caustic," however, is an adjective that can mean "able to burn or corrode organic tissue by chemical action" or "sarcastic in a scathing and bitter way." Because the second definition of "caustic" is similar to the meaning of "acrimonious," "caustic" is the correct answer.

For something to be described as placid, it means it iscalmand tranquil. For example, someone with a placid disposition iscalmand peaceful in nature.

"Demure" is an adjective that means "of a woman or her behavior: reserved, modest, and shy" or "of clothing: lending such an appearance." So, neither "brazen" nor "proud" can be the correct answer because each of those words are an antonym of "demure." Because "shy" is the answer choice closest in meaning to "demure," it is the correct answer.

An ardent statement means that ispassionateand very enthusiastic.

"Petulant" and "sullen" both meancrabby or moody. "Guileless" meanshonest or forthright. "Florid" meansvery elaborate or decorative. "Extravagant" meansindulgent or wasteful. "Esoteric" meansmysterious or obscure.

"Fervent" and "ardent" both meandevout or passionate. "Apathetic" meansuncaring or disinterested. "Dispassionate" meansunfeeling or impartial. "Intermittent" meansirregular or sporadic. "Virulent" meanspoisonous or lethal.

If you are “contrite,” it means you arehonest about your feelings of regret and guilt over something you have done wrong. This is very similar in meaning to “remorseful.” “Disingenuous” meansnot candidorinsincere and dishonest; “supreme” meansbest of all; “corporeal” meansrelating to the body; and “cerebral” meansrelating to the mindor, when used to describe a person,intelligent.

“Ecstasy” isa feeling of deep joy and happiness, so "joy" is the best answer. As for the other answer choices, “sorrow" is an antonym of “ecstasy” and meansdeep sadness; and "demeanor" meansmannerorappearance.