How do animals use protective coloration? how is this important to both predators and prey?

For prey: it's used for hiding from predators
For predators: it's used to sneak and pounce on the prey

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.