It's a problem - a problem originates when a question is asked. In this case, we have come up with a problem that needs a solution:
1. - We'll experiment in order to come up with a hypothesis (a not-valid-yet answer of what the solution to our problem is).
2. - After a series of experiments that either prove or prove our hypothesis wrong, we'll be able to come up with a theory (a valid but still discussable final hypothesis of what the solution to our problem is).
One of the things that controls population growth is the availability of food, the birth rate and death rate, the maximum carrying capacity of an area, and disease.
