Analyze: Click the FOREST tab. Click the pulse (+) button for mushrooms several times. Click advance year a few times. Select the DATA tab How did adding mushrooms affect trees?

i can't see the full page, therefore, can't answer it

explanation:

i believe it would be c: tons.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.