Assertion: Natural selection always results in the fittest individuals surviving and reproducing.
Reason: Fitness is determined by an individual's ability to adapt to changing environmental conditions.
Both assertion and reason are true, and the reason is the correct explanation of the assertion.
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
The assertion is true, but the reason is false.
The assertion is false, but the reason is true.
Natural selection favors individuals with advantageous traits in a given environment, resulting in those individuals being more likely to survive and reproduce. Fitness is determined by an individual's ability to adapt to changing environmental conditions and is relative to the specific environment in which the individual exists.
Option 1 is the correct answer.