Question: Dopamine is the neurotransmitter involved in the pathway of the brain called the "reward pathway"​

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

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.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

not: both offer magnification to the atomic level.