Correct Answer:

Presence of cell wall

Solution : The correct option is the presence of the cell wall.

Viruses are distinct from bacteria and some other microorganisms in that they do not possess a cell wall. Instead, they consist of genetic material (either DNA or RNA) enclosed within a protein coat called a capsid. Unlike cells, viruses do not possess cellular components or the capability for independent metabolic functions. They are categorised as obligate intracellular parasites since they rely on a host cell to reproduce and fulfil their life cycle.