Answer:
Option (3)
Step-by-step 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).