Why do viruses need living hosts, such as bacteria or eukaryote cells?

Question

a
The host cell is the source of food for the virus.
b
Viruses depend on the host cells that they infect to reproduce/replicate.
c
Viruses depend on a host cell because they lack their own DNA or RNA.
d
Viruses have a cellular structure which never requires a host.

Answer 1

The correct answer is:

b. Viruses depend on the host cells that they infect to reproduce/replicate.

Viruses cannot reproduce or carry out metabolic processes on their own; they require a host cell to replicate and produce new virus particles. They hijack the host's cellular machinery to make copies of themselves.