A lake such as the one pictured is considered an
open system because

A. it is isolated by the mountains
surrounding it.
B. there is an input and output of energy
and water.
C. there are no interactions with other
bodies of water.

Predator instincts is what causes it

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.