All of them. Forests are considered natrual enviornment and people/buildings are man-made environment
sorry for bad spelling
B is the answer to your question
pretty sure it is an ultrasound
Answer:
they attach to the bones.
<span>Photochemical smog, created by the chemical reaction between sunlight, nitrogen oxides and volatile organic compounds is (e) generally worse during the winter months in part because of the increase in energy used to heat homes and other buildings.</span>
