Which statement is the best example of a claim?

people said that man could not fly, but in 1903, orville and wilbur wright made the first sustained powered flight in a heavier-than-air machine.
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people said no one could scale mount everest, but in 1953, sir edmund hilary and tenzing norgay gazed down upon the world from its summit.

you can’t prove that something is impossible—all you know is that [it] hasn’t been done yet.

first of all, if someone says your dream is impossible, they're wrong.

You can’t prove that something is impossible—all you know is that [it] hasn’t been done yet.

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.

the type of supporting detail is fact!