Which represents the greatest time frame in which a short-term environmental change can occur? in days
in minutes
over hundreds of years
over thousands of years

Over hundreds of years

Explanation:

Environmental changes occur as a result of human action and natural processes. These changes leads to the disruption in the normal environmental processes. Examples of human actions include release of pollutants into the atmosphere, overcrowding and destroy of plants and animals habitats etc while the natural causes include earthquakes and the end results include climate changes.

The greatest time frame in which a short-term environmental change can occur is over hundred of years as environmental changes are normally known to occur after several thousands and millions of years.

it is called an accent mark

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.