Which of the following is a good scientific question? a. are dragons lizards or birds? b. how do star fish fall in love? c. does eating less fat increase a mouse's life span? d. why do crickets chirp?

its C. Does eating less fat increase a mouse's life span?

Explanation:A scientific question cannot be asked about something that does not exist, so the question about dragons is out. Similarly, starfish do not fall in love as far as we know, nor would we have a reliable way of measuring how they did. The cricket question asks only "why?" and lists no variables. The only question left is "Does eating less fat increase a mouse's life span?" This question can be answered by giving different mice various diets and seeing how long they live.

option number c is the right answer.