What is the black smoke? a. smoke that arises after the martians use their heat rays b. gas that the military uses to try to kill the martians c. a vapor the martians use to kill humans d. exhaust from the martians' machines

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.