Which of the following increases variation within a gene pool?

Which of the following increases variation within a gene pool?

مندرجہ ذیل میں سے کون ایک جین پول کے اندر تغیر کو بڑھاتا ہے؟
Explanation

Gene mutation increases variation within a gene pool.

Mutations introduce new alleles into a population.

It leading to genetic diversity and potentially new traits.