I would go with C because people can also cause land pollution
It was custom to bury sick family members alive.
Weight that is below the desirable body weight is under-weight :]
The heart is the system's pump and the blood vessels are like the delivery routes and it is a muscle. The pumps are the beat. The heart is a muscle about the size of a fist and it is the muscle in the body that works the hardest. The statement that the heart muscle rests only between beats is true
