Answer:
2. collaborative learning (pair work/group work)
Explanation:
The Behaviorist Theory of language learning and acquisition focuses on skill development of infants and young children. The theory presents a model that sheds light on the development of skills and language learning process in infants that is used for acquiring the needed language speaking ability. The theory suggests that it is done by watching and imitating the parents and other people in the surrounding and then inducting new words based on the reward they have got for the earlier imitation and practice. Hence, option 1 and option 3 can be considered a part of Behaviorist Theory but option 2, collaborative learning is not suggested by the theory.