Which question can be answered by following the scientific method?

The correct option is 'How does a change in temperature affect the stomata of a plant?'

Explanation:

A scientific question is the one which can be answered by the scientific method. The scientific method comprises of a question based on which a hypothesis is generated. A hypothesis is a tentative statement which can be proved either right or wrong. Experiments and observations are made to test for the hypothesis. Based on the experiments, results are generated and concluded.

The only question which can be answered from the options though the scientific method is 'How does a change in temperature affect the stomata of a plant?'. Hence, it is the correct option.