Find the mismatch from the following pairs.

Genetic drift operates in

Given below are two statements.
Statement $I$ - In disruptive natural selection,individuals acquire peripheral character value at both the ends of the distribution curve.
Statement $II$ - Industrial melanism is an example of disruptive selection.
In the light of the above statements,select the correct option given below:

The core essence of Darwinism regarding evolution is ........ .

Which characteristic is responsible for the formation of a new species?

When we say 'survival of the fittest',does it mean that $(a)$ those which are fit only survive,or $(b)$ those that survive are called fit? Comment.