Horse breeders often mate horses that have special traits that they will pass on to offspring. this is an example of
survival of the fittest
evolution
artificial selection
natural selection

artificial selection

Explanation:

When the breed is physically created to promotes best traits the process is artificial because it is humanly hand picked .

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.