“Lucrative” is an adjective that means “producing profit,” so we need to pick out an answer choice that means something like “producing profit.” That means that “unprofitable” cannot be the correct answer, because “unprofitable” can mean “not yielding profit” when referring to a business or activity, making it an antonym, not a synonym, of “lucrative.” “Profitable,” however, is an adjective that means “yielding profit” when referring to a business or activity, and because “profitable” is the answer choice closest in meaning to “lucrative,” “profitable” is the correct answer.

"Expensive" means costly.

"Paltry" means incredibly small and meaningless. "Meager" is the best choice because it also means worthless or not enough. 

The word "lucrative" means profitable or moneymaking. The best choice is "advantageous" because it means profitable or useful.

"Valuable" is defined as worth a great deal of money. Since "expensive" things are highly priced, "expensive" is the best answer choice. "Worthless" is an antonym of "valuable."

The word "faulty" is an adjective that means—unsurprisingly—having a fault or faults. A "faulty" tire is one that does not spin correctly, and a "faulty computer" is one that does not work as it should. You might get confused looking at the options and think that perhaps "trembling" is a good good answer. A "fault line" is an imperfection in the earth's crust, leading to earthquakes at times. However, the word "faulty" mere indicates imperfection or flaws. Therefore, "flawed" is the best answer.

"Elite" means having superlative qualities. "Best" means better than all other options. Given how similar these words' meanings are, "best" is the synonym for "elite."

The word “pathetic” means so embarrassing that you make people feel bad for you, so "pitiful" is the correct answer, as it also means making people feel bad for the person or thing described.

Something that is “toxic” is poisonous and would make you sick or kill you if you consumed it. The word “medicinal” is used to describe something meant to help you feel better when you are sick.

As foolish as it might seem, think of "remarkable" in a very literal sense (at least at first): Something about which remarks are made. It is "remark-able." We say that something is "remarkable" when it is out of the ordinary, when it stands out from the crowd. If something is just normal, we do not make many remarks about it. However, when something is extraordinary, we talk about it and discuss it. While it might seem that this would be synonymous with "fame," being remarkable really is about being extraordinary or amazing, and one does not necessarily need to be extraordinary or amazing to be famous. Therefore, "amazing" is the correct answer.