PLS HELP ASAP I know it is not in the right class

In a chemical reaction, products are the substances present after the reaction

Explanation:

The balanced chemical reaction will be, In this reaction, are the reactants and are the products. From this we conclude that, the substance that are present after any chemical reaction are called products and the substance that present before any chemical reaction are called reactants.

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.