As robert transitioned from college to the professional world, he began to smoke marijuana less frequently and stopped drinking on weekdays. robert’s behavior is an example of

Robert's behavior is an example of maturing out.

Explanation:

This term is used for the process an addict has in which he/she has a  recovery which can be natural or spontaneous, simply by the course of life. The individual stops struggling with the abuse of any substance he/she was addicted to.

In this case, Robert smokes less marijuana and stopped drinking, all because of life's course and his transition from college to the professional world.

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.