Which question about whale sharks is nonscientific?
what do whale sharks eat?
how big is the average whale shark’s mouth?
does a whale shark like having a large mouth?
what happens to the water that enters a whale shark’s mouth?

Option (3)

Explanation:

Scientific questions are those that follow the principle of science and that can be tested and the hypothesis must be proved. When a question does not fulfill these conditions then, it is considered to be a non-scientific question.

From the given option, "does a whale shark like having a large mouth?" is a non-scientific question.

It is because it does not involve anything scientifically. This question is about the whale shark, whether it likes to have a large mouth or not. This question does not provide any answer related to science and the answer cannot be tested and o hypothesis can be constructed.

Hence, the correct answer is option (3).

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.