Question

The best source of internal motivation is

Answer 1

The best source of internal motivation is:

Positive self talk

Answer 2

The answer that best completes the above sentence is "Positive self talk"

This is firstly because, internal motivation comes from with oneself, and not form another (motivation from another person is external motivation). Having said that, in motivating oneself, it is important for a person to be able to talk positively to themselves; this increases self-esteem which in turn leads to increased motivation.