a parasite does not intentionally kills its host. why is it mutually disadvantageous to both the parasite and the host if the parasite kills the host?

because it relies on the hosts body and body functions

Explanation: hope that helped ;)

i dont know it at allnow im just getting points at this pint

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.