Four-year-old tommy notices that every time his baby brother cries, his mother picks him up and holds him. tommy quickly learns that if he also cries he will get his mother to pay attention to him. tommy's change in behavior is an example

Modeling.

Explanation:

Albert Bandura  social learning theory is the development of the classical conditioning theory and operant conditioning theory in which he stressed the role of observation and modelling in the learning process of an individual. He introduced a social element to his argument, arguing that people would learn new knowledge by looking at other people. Tommy's behavior is changed just by observing his brother and mother and therefore he imitate the behavior of his brother.