Andrew wants to play baseball with his friends. before andrew can play, his parents tell him that he has to clean his room, which he hates to do. requiring andrew to clean his room before he can play baseball with his friends is an example of:

Requiring Andrew to clean his room before he can play baseball with his friends is an example of:

The Premack Principle

The premack principle or the relativity theory of reinforcement, was named after David Premack who proposed the rule "high-probability behaviors can be used to reinforce low-probability behaviors.

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.