What is the variation of traits among members of the same species called?

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:

Natural selection where more individuals acquire specific character value other than the mean character value,leads to:

The theory of natural selection is based on which of the following?

The sequence of events in geographic speciation is most likely to be

Genetic drift operates in which of the following?