What is the relationship between a mutation and a gene?

Question 2 options:

A mutation changes the sequence of DNA bases of a gene.

A mutation creates new genes from the same DNA segment.

A gene causes a mutation when it manufactures the wrong prote

the volume increases

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

a electronegativity decreases beacuse the size of nucleus is bigger.