Answer:
Africa
Explanation:
Our species, Homo sapiens, has dominated the world but it's generally believed that we originated in Africa by about 200,000 years ago. We interacted with local archaic human populations as we colonised the globe.
The Mississippi-missouri river system is the largest river system in America.
Answer: The post-reinforcement pause.
Explanation:
The post-reinforcement pause occurs when the delivery of a reinforcer on fixed-ratio and fixed interval schedule of reinforcement. When he considers not to do anything after having so much before him this behavioural type is known as post-reinforcement pause
