Available options:
[i] animals;
[ii] Most plants;
[iii] humans;
[iv] organisms;
[v] cell walls;
[vi] rock;
[vii] cell membranes;
[viii] mammals;
Given those answer options, answer the question: Fact 1: Cells are the basic units of the structure and function of living things. Fact 2: An organism is a living thing. Given the two facts above, cells are the basic units of the structure and function of what?
A:
[iv]