Why are viruses considered to be nonliving? A. They have no genetic material.

B. They cannot reproduce without a host cell.

C. They do not respond to their environment.'

D. They cannot use energy.

B. They cannot reproduce without a host cell.

It is considered to be nonliving as it cannot reproduce on its own.

Explanation:

Without a host cell they are unable to reproduce as it does not have the necessary reproductive tools.

It reproduces by using the host cell's reproductive tools by taking control of it.

Viruses also don't need energy as living organisms do. So the answer may be D. as well.