Answer: positive reinforcement
Explanation:Reinforcement is defined as increase in a behavior. Reinforcement is usually positive or negative. Positve reinforcement is when needed or advantageous stimulus is added to increase ones behavior or character.
positive reinforcement entails adding a reinforcing stimulus to a behavior that empowes the behavior to occuror appear again in the nearby future. Example is when you reward a child for a performing a particular task, the child will love to do that particular task often so as to get the reward. This can help the child to have the behavior you want him to develop and most times even when there is no reward the childs behavior is altered or changed already to always perform that task.
The answer is C. The depopulation of the Americas, the overall effect was a decreased population growth worldwide.
Americans had never had diseases like smallpox, measles, whooping cough, among others, for that reason, they did not have defenses against them, when there was the interchange with the Europeans, there were a lot of deaths, which caused a big decreased in the population and in world general, because native people could not fight with those diseases.
The correct answer is B.
A mineral is defined as a naturally occurring substance that has a definite chemical composition and crystal structure.
In order for a substance to be called a mineral, it must have all the four characters described in the definition.
- a mineral is always a solid and has a definite shape and volume.
- most minerals are made of two or more elements chemically combined to form a compound. It may also be made of a single element e.g. gold, copper or sulphur.
- all minerals have a characteristic crystal structure.
- minerals are grouped according to their chemical composition or makeup
