Most successful parasites, such as this cat flea, weaken their host but do not kill it. why is killing its host usually disadvantageous for a parasite?

Arelatives of the host would then attack the parasites.

Blysosomes from the host would then attack the parasite.

Cif a parasite kills its host, it will then have to find a new host in order to survive.

Dparasitism is a relationship where both organisms benefit; killing the host is not beneficial to the host.