They are often very rich in nutrients and hold water well because of their volcanic ash content. ... These soils are called Andisols, and they are often very young, and acidic depending on which type of volcano they come from.
This is an example of Positive reinforcement.
Positive reinforcement is the addition of a reinforcing stimulus (giving the dog a treat) following a behavior (rolling over), that makes it more likely that the behavior occurs again.
The correct answer here is A. There has actually been a genocide in Rwanda. zIt happened in 1994. And colonizers had little respect for the native people. <span />
Most work in mines. Central and west africa have some of the richest diamond, silver and iron mines in the world.
