Answer:
Theories <em>can</em> be created by just one person
Explanation:
What normally happens is that one person creates a theory, and as years go by new research comes out further advancing or modifying a theory. The theory then is created by many people. Which overall still means that theories can be created by just one person.
Population density is the number of organisms in the population in a certain area:
When chemical compounds that are formed from ionic bonds decompose, the products are actually the individual ions, that constitute or make up the original ionic compound.
My guess on this question is C
B is the answer, unsaturated then saturated then supersaturated
