What word is used to refer to a group of organ systems working together? A: organism B: cell C: tissue D: organ​

A: organism

Explanation:

A host loses nutrients to a parasite.

Explanation:

A host-parasite relationship is called parasitic symbiotic relationship which means the host loses its nutrients to a parasite (host is harmed), and parasite whether endoparasite or exoparasite gets nutrients (parasite is benefited).

Hope this helps ;) ❤❤❤