Soil composition and horizons vary depending on climate.

The statement is correct. Weathering is when rocks degrade and give rise to sediments that are transformed into horizons and soil. What contributes to weathering is fundamentally the weather. Therefore, the climate influences the formation of the horizon and the ground, because over time the variation of temperature, wind pressure and frequency of rain shape the geography of a space.

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.