If it is a healthy environment then the atmosphere will be happy meaning no dirty streets etc
Answer:
A is the answer
Explanation:
Carbon dioxide and water are the reactants of both processes
Oxygen and carbon dioxide travels to and from tiny air sacs in the lungs, through the walls of the capillaries, into the blood. Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs.

A sudden shift in the tectonic plates of the earth
Answer:
B
Explanation:
Sickle cell anemia is an autosomal recessive trait, meaning two recessive alleles must be acquired by the child (one from each parent) for them to be affected with the disorder.
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Hope this helps :) Have a good night!</h3>