Answer:A black hole is a place in space where gravity pulls so much that even light cannot get out.
Explanation:
I believe the answer is:
in direct contact with a HIV positive person's body fluids such as blood or semen.
The three main functions of the human digestive system are to break food down into chyme for the body's use, to secrete and absorb nutrients and bodily fluids into the gastrointestinal tract or the blood, and to store and eliminate waste. The digestive system has major parts and accessory parts.
