Harry lives in a city, and he has a lung condition known as asthma. On certain days, Harry has to stay inside because pollutants in the air make it difficult for him to breathe. Which of these pollution sources are nonpoint sources that might bother Harry if he goes outside? Choose the two that apply. A. cars on the highway
B. his gas-fueled lawn mower
C. nearby factories
D. smoke from their grill

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

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.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.