Question

What is a parasite ?​

Answer 1

Answer:

an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.

"the parasite attaches itself to the mouths of fishes"

Answer 2

Answer:

Parasitism is a symbiotic relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life.