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 respond to light
c. it must be able to convert energy from one form to another
d. it must be able to move

A. it must be able to replicate its dna

Explanation:

To consider something to be alive the organism must have a DNA a form of genetic material which is replicated by the cellular machinery. This genetic material is necessary for proper growth and development of cells.

Viruses are not considered as living as they use the host cell machinery to replicate their DNA.

radon is correct hope this