What is collusion among oligopolies, and how does it tend to reduce competition and harm consumers by imposing higher prices

Collusion consists of a small group of businesses/corporations working together in order to manipulate prices of a product or good within a society. This negatively effects society, as it reduces competition.

Here's an example. Let's say there are only 4 businesses that sell cars. These 4 businesses could work together to make sure they charge consumers a very high price for their cars. This is collusion. This hurts the customer because there are so few places where a car can be bought. The consumer has no choice but to go to one of these four businesses in order to buy a car.

Social darwinism refers to the the theory that people who succeed in our economic system will one day out compete those who fail. one day the rich will out succeed the poor so we'll that there will eventually be no more poor

Your answer is d)magnesium