Here Jack is influenced by what Burrhus Frederic Skinner an American
psychologist calls negative reinforcement. Negative reinforcement which is the
opposite of positive reinforcement and it means that the rate of behavior is increased
in order to avoid an unpleasant situation or unpleasant stimulus or negative
outcome.
Answer:
. c the Union controlled the Mississippi.
Explanation:
The battle of Vicksburg which was started on 18th May 1863 and lasted till 4 July of the same year is one deciding battles of the Civil War of the United States. Union Major General S.Grant and his Army Of Tennessee crossed the Mississippi and put the Confederates Army into a defensive line. He charged two assaults on the fortress of Vicksburg but with little success and then he decided to besiege the fortress of Vicksburg. the confederate army ran out of supplies and surrendered after forty days. The defeat resulted in weakening the war efforts of Confederates and Mississippi was controlled by the Union.
A sandblasted rock could be different in color because sandblasting takes the top layer of the rock (which has been weathered) off.
Answer:
According to the early human migration patterns they moved for about two to three miles per generation.
Explanation:
First of all, we need to contextualize here to understand why humans only moved as far as three miles per generation. Now, to start I would like to point out something. Early human groups weren't a settled group of civilizations, they were nomads and collectors, in the best cases they started to develop crop farming methods but that was really unlikely. So they depended almost solely on gathering and hunting. Thus, they weren't really able to get enough resources to perform long trips. They followed animal groups to hunt them down and that was also a reason to only move in small distances. Because in that time animals had plenty of places to move in the same areas. Also because if they had enough resources in a single place there was no real reason to leave. But that changed when settlements and civilizations developed. Rivalry for resources was a major migration factor.
