Question

Which best explains why a parasite needs a host?

1. Parasites use their host as a energy source.
2. Parasites use the immune system of their host.
3. Parasites use their host to increase their oxygen supply.

Answer 1

the answer is 1

Step-by-step explanation:

Answer 2

its #1

Step-by-step explanation:

normally parasites need energy of another body to stay alive hope this helps