The correct answer is endorphins.
During strenuous exercise, the brain releases the neurotransmitter called endorphins. Endorphins are known as "feel good" chemicals that produce a feeling of euphoria, reduce anxiety and the ability to experience pain. Endorphins also produce a feeling of happiness and relaxation after an intense exercise session.
Come up with a logical plan, that will work, to improve the country’s water pollution problem.
I think . circular motions in the atmosphere.
Because this is one of the ways we communicate with our children and what you put out in the universe is what you get back from,the universe