Light that is visible to humans occupies what part of the electromagnetic spectrum?

The visible light spectrum

Explanation: There are seven main parts of the electromagnetic spectrum grouped by wavelength, frequency and energy: radio waves, microwaves, ultraviolet, infrared, visible light, X-rays, and gamma rays. The only waves that are visible are in the visible light spectrum.

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.

the answer is c.) there is a warm front in region a and a stationary front in region b.