Explain how human activities can cause an imbalance in biochemical cycling and lead to problems such as cultural eutrophication and fish kills

When he put fertilizer in the ground in can sometimes in up in ponds making algie grow and killing fish

Confused on question what should we be answering

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.