In the diagram below, which step represents the excretory function of the lungs?

a. blood in
b. co2 out
c. o2 in
d. blood out

B. CO2 out

Explanation:

The excretion is the process of removal of the waste product from the body. The carbon dioxide is the byproduct of the aerobic respiration, which is carries from the tissues and the lungs by blood. In the lungs at alveoli, the carbon dioxide is transferred from the blood to the lungs and released out through the nostrils. Hence, the out of the carbon dioxide represent excretion through lungs.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds

yes, because even though a theory has a  lot of evidence to support it, it is not always true