C) Natural selection
When something happens in nature and something changes all of a sudden, the animals tend to adapt to what gives them more chances of survival. As a result, a large amount of the population would attempt to adapt in a way that helps them survive.
All Audiologists must have a Doctoral or professional degree to qualify for work in the audiologist field.
Point source pollution is a single, identifiable location of a pollution like a drainage or a pipe. On the other hand non-point source pollution refer to wastes that are disposed at a wide area and cannot be easily determined where the sources are. The answer for this is false. It is the non-point source pollution that is difficult to track and to control.