Why do two electrons repel when they interact?

Question

Responses

because they both are subatomic particles

because they both form part of different atoms

because they both have similar mass

because they both have similar negative electric charge

Answer 1

The correct response is: because they both have similar negative electric charge.

Electrons are negatively charged particles, and according to the principles of electromagnetism, like charges repel each other. Therefore, two electrons will repel each other due to their identical negative electric charge.