In order to be effective, a media message must
a. entertain the viewer or reader and make him change his point of view
b. accomplish its purpose and be appropriate for its audience
c. not contain subjective information

science.

modern problems require modern solutions.

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.