Question

fleas and dogs have a parasite/host relationship. what happens to the fleas in a home when another dog is brought into the home? (1 point)
the flea population increases because there are more dogs to live on.
the flea population decreases because fleas are not be able to live on all dogs.
the flea population decreases because the fleas harm the dogs they live on.
the flea population increases because the relationship is mutually beneficial.

Explanation:

In a parasite - host relationship, the parasite benefits at the host's expense. When a new dog (host) is brought in, it provides more resources (a new host) for the fleas (parasites). Fleas rely on dogs for food (blood) and a place to live. With an additional host (dog), there are more opportunities for fleas to feed, reproduce, and survive. This leads to an increase in the flea population as there are more hosts (dogs) available for them to live on.

Answer:

The flea population increases because there are more dogs to live on.