[[Ques]]: How do animals dissipate body heat?
Options:
- (A) sweat
- (B) eat food
- (C) lay in the sun
- (D) insulation
- (E) coat
- (F) osmosis
- (G) fur
- (H) cooling
[[Ans]]: [Evaporation of sweat uses energy, and the energy comes from body heat. Animals are inefficient energy converters. Animals produce body heat which is dissipated by sweat.]
[(A)]

[[Ques]]: Trees have woody stems covered with what?
Options:
- (A) food and shelter
- (B) smooth ridges
- (C) looseness
- (D) protective layer
- (E) Organic compounds
- (F) plastic sheet
- (G) heat energy
- (H) thin metal
[[Ans]]: [Trees have woody stems covered with bark. During the stripping, the protective layer of inner bark is removed. Trees have woody stems covered with a protective layer.]
[(D)]

[[Ques]]: Most people can survive only a few days without what?
Options:
- (A) carbon dioxide
- (B) oxygen
- (C) h2o
- (D) H20
- (E) NaCl
- (F) CO2
- (G) soda
- (H) urea
[[Ans]]:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
[Most people can survive only a few days without water. Water is everywhere H20. Most people can survive only a few days without H20.]
[(D)]