Which of these questions can be answered through science?

what is the best water sport?
why should we value honesty?
why does water change into steam?
what is the most important thing in life?

Option C

Explanation:

Changing of water into steam is a physical process in a substance changes its state from liquid to gas.

While in all other option such as

Option A - the answer varies from person to person based on their choice

Option B - Is also a human value/ethic based question and hence science cannot help in this matter.

Option D - This is also a question depending on personal choice of a person.

Hence, option C is correct

the cell theory states that all living things including animals, as well as plants, are made of cells.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.