We know this thanks to archaeologists who excavated many places and discovered that many early civilizations gathered around large rivers where they could develop agriculture. This was seen in places such as Mesopotamia, India, China, Egypt, etc.
This is an example of negative reinforcement.
Her mother scolded her every time Jane bit her nails - so Jane learned that every time she bites her nails, she is going to be scolded sternly by her mother. In order to avoid that, she stopped biting her nails, and thus the reinforcement was successful.
Answer: Western Africa.
Explanation:
Blues and jazz are influenced by African rhythms brought through the transatlantic slave trade that took slaves mostly from central and western Africa to be bought by European slave traders and sent to the New World. Gospel music, the African-based rhythm that later developed into jazz, had its roots in the call and response practiced in the slaves´ spirituals.
