The correct answer is B. Modeling
Step-by-step explanation:
Modeling is a learning strategy or cognitive-behavioral technique that implies observing the behaviors or actions of others and then modeling or shaping own actions and behaviors according to the ones observed. This means learning occurs through modeling or by copying others. This is the case of Alex because as he does not know how to use cutleries he decided just to observe others and then copy their behaviors which means he larnt to use cutlery through modeling.