Options are:
(A). density.
(B). clouds.
(C). embryos.
(D). plants.
(E). matter.
(F). ferns.
(G). humans.
(H). batteries.
Q: You are presented with the quiz "what are cells the basic units of?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cells are the basic units of the structure and function of living things" and "humans, angels, animals, and all other living things are finite". So, what's the best answer to the question?
A:
(G).