Possible reasons we need sleep include. А. rest and repair of the body.

B. brain development.

C. processing of memories.

D. all of the above.

Wjat are substances intentionally added to food to produce a desired effect?

Andrew loves to go camping and hiking in the fall. about two weeks after his last camping trip, he noticed an expanding red, target shaped, rash on his arm. to avoid this illness, andrew should have select one: a. boiled his water before drinking. b. avoided contact with ticks. c. avoided contact with fleas found on mice. d. camped only in the spring.

When it comes to our health and the treatment of diseases, technology has had a effect. a. very negative b. neutral c. positive d. negative