Which of the following is cycled through time?

Question

a. coal

b. water

c. calcium

d. sand

e. all of the above

Answer 1

I am not sure exactly how to interpret your question.  I will say E.

Coal goes through different stages to become anthracite coal

water goes through the water cycle

calcium cycles through the human body

sand is produced by the processes of the rock cycle

So that leaves E.

Answer 2

b. water