Natural selection is defined as what?

Natural selection correlates to the evolution theory. Basically, it is the theory of survival of the fittest.

Explanation:

For example:

There were a plenty of birds in a forest with a limited quantity of foods. The bird with the advantageous features will out compete the other birds in order to survive. This bird will the survive and this will pass to the next generation. Hence, the offsprings would have similar features as the survived bird

Natural selection is defined as what?

Natural selection entails the ability of an organism to adapt to an environment and such adaptive traits are passed from parents to offspring

Explanation:

The law of natural selection was propounded by Charles Darwin which entails the survival of an organism by adapting to an environment and such adaptive trait is passed to offspring