Social theory emphasizes learning through observation and imitation of models in the process of gender-role development.

The correct answer is "learning".
The Social Learning Theory is an idea of acquiring information and social conduct, which proposes that new conduct may be acquired through watching and imitating others. It states that getting to know is a cognitive process that takes vicinity in a social context and may arise in basic terms by observation or direct guidance, even inside the absence of motor replica or direct reinforcement.

Ibelieve that the answer is (a).