Well biotic factors are living things basically so anything living would apply. Mold could be an answer or lettuce in a fridge. Hope this helped.
The answer is C<span>. 3,2,1,</span>
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Thank you so much for the points luv ya
Answer:
They increase the levels of catecholamines—a family of brain chemicals that includes dopamine.
Explanation:
Stimulants are a class of drugs that “stimulate” the body's central nervous system, which includes the brain and spinal cord. They increase the levels of catecholamines—a family of brain chemicals that includes dopamine. These chemicals are used in the brain processes to signal reward and motivation.
