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.

this is not a question

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.