Respuesta :

Answer:

A) a wolf

Explanation:

an organism is an individual: a wolf

a group: a heard of sheep

a measurement of a compound: a drop of water

an organ: a heart

ToxicRosin
Organism: an individual animal, plant, or single-celled life form.

Since a wolf is the only individual animal, plant, or single called life form in this list, it is the only answer, by process of elimination