When a professor reviews a certain topic many times, he is practicing . psychological conditioning stimulus-response conditioning subliminal conditioning repetition conditioning

Click on  the link  to view information gathered by the organization keep america beautiful. read "the costs of american littering" to find three negative effects of litter in local communities.  based on your research, what are the negative effects of litter in local communities? check all that apply.litter cleanup is very expensive.litter has decreased since 1969.litter is a constant community problem.litter causes property in the community to be less valuable.litter contaminates water and has other environmental consequences.

What do supreme court decisions based on the first amendment usually involve?

To what is the growth of civilization most clearly traced