Which statement about human blood vessels is correct?

a. veins transport blood from the heart to the capillaries.

b. arteries carry blood toward the atria of the heart.

c. the pulmonary artery carries oxygen-rich blood from the lungs.

d. pulmonary veins carry oxygen-rich blood to the heart.

e. arteries carry oxygenated blood; veins carry oxygen-poor blood.

d.Pulmonary veins carry oxygen-rich blood to the heart.

Explanation:

Pulmonary veins carry blood form the lungs (where the blood is oxygenated) to the heart (left atrium). There are four main pulmonary veins.

Pulmonary veins are exceptions, because, usually veins carry oxygen-poor blood while arteries carry oxygenated blood.

The pulmonary veins are part of the pulmonary circulation.

mass and weight are closely related because mass affects the weight of an object experiencing the effects of gravity. weight is the measure of the force of gravity on an objects's mass, while mass is the measure of how much matter there is in an object.

increases the risk of extinction 

explanation:

the answer is that if the species suffers from the disease, there is nothing stronger than the others, so it is possible to remove wholeness. an example of this is hunger in irish potatoes, which has a deadly disease bearish part of all potato harvest masses. pretty much ruins the land of crops.