Industrial melanism is an example of which of the following?

What is the primary force of evolution?

Artificial selection to obtain cows yielding higher milk output represents:

What is the process called in which organisms with different evolutionary histories evolve similar phenotypic adaptations in response to a common environment?

When members of a population attain sexual maturity at different times preventing inter-breeding,it is termed as . . . . . . isolation.

In a species,the weight of newborn ranges from $2$ to $5 \; kg$. $97 \%$ of the newborns with an average weight between $3$ to $3.3 \; kg$ survive,whereas $99 \%$ of the infants born with weights from $2$ to $2.5 \; kg$ or $4.5$ to $5 \; kg$ die. Which type of selection process is taking place?