Self-efficacy, a concept developed by Albert Bandura, refers to a person's belief in their own ability to succeed at a task through their own effort and action.

The statement "I can improve with practice" reflects confidence in one's capacity to grow and succeed, which is the core of self-efficacy.

Anxiety and low intelligence describe negative or unrelated states, and external motivation refers to being driven by outside rewards rather than a belief in one's own ability, so none of these fit this statement.