A(n)
clause should always be separated from the rest of the sentence by commas.
Albe

halibut, flounder, tuna, and trout are all fish. so your first answer is 1.) fish. and since fish is edible, your next answer would be 3). edible

to describe those fishes more thoroughly, some of those fishes live in fresh water, and some of the fishes live in salt water, and that is not a thing that they all have in common. the question is asking what is common with all of the fish, so answer choices 2). fresh water and 4). salt water are not right.

tom robinson he was a black man that was accused of raping caucasian woman, and an idealistic lawyer offers to defend him. which makes nobody believe in the innocence of a negro.