External motivations
social pressure
self motivation
It’s a because if you read that’s what it says
These units of hereditary information are called “genes”.
Erin and Mel are having marital problems. It would help their relationship if anyone of them would ask, "Can we talk about this?". Communicating about the problem would help the couple understand what happened and figure out a solution. The statements like, "It's all your fault.", How could you do that to me?", and "I can't talk to you right now." will only make things worst and not help the relationship.