Which of the following must be true to consider something to be alive ?
a. it must be able to replicate its dna
b. it must be able to response to light
c. it must be able to covert energy from one form to another
d. it must be to move

To consider something to be alive it has to fullfill multiple criteria. One definitevely to be able to move - D. Another is C - to be able to convert energy from one form to another. While not completly explained, different food which we eat undergoes this process every time.