That will be rain, soil , and sunlight i think.
When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. This would make the answer be.... A. a chemical signal is released
C. esophagus. it does not secrete any enzymes. its just do peristalsis. which is a rhythmic contractions and relaxations of muscles to push food along the gut
Answer:I think you just said the answer keep them in the order you have it
Explanation:so you just put the colors under the different waves