Utilizing classical conditioning, operant conditioning, and/or observational learning in an effort to change behaviors is referred to as

In which book word demography is used for first time

Can someone give me a hand with this one.

Answer in a couple of paragraphs, 1 or 2 at the most if anything! 20 points + brainliest--> explain what all the systems in your body do to work together < --list of systems needed: circulatory systemrespiratory systemdigestive systemexcretory systemnervous system