Answer:
Available freshwater allowed people to grow food.
Explanation:
Water is super important for a lot of different reasons. The more water that people had, the more crops that they can grow.
A boundary separating two masses of air with different densities. It is the principal cause of the odd weather patterns and phenomenons outside of the tropics.
Answer:
a. Continuous reinforcement schedule (CRF)
Explanation:
Under DRA(differential reinforcement alternative), behaviour that is an accepted alternative to problem behaviour is accepted and reinforced. This reinforcement frequency correctly falls under continuous reinforcement schedule(CRF) where behaviour is reinforced everytime there is a correct response. For example, if you were teaching a child to pronounce certain words correctly, you would reward the child everytime he got a pronunciation correct.
Social Darwinism is the term given to various theories of society which rise in the North America, Western Europe and United Kingdom during 1870s. The theories are applied to natural selection and survival of the fittest.