Question

1. global warming

a. is caused solely by humans.
b. is not real.
c. is a natural process.
d. helps only tropical organisms.

1. how do humans most use power?

a. in homes
b. in cars
c. in fossil fuels
d. in airplanes

1. what is the most careless use of natural resources?

a. watching tv at night
b. using natural gas to heat your home in the winter
c. having a nighttime security light at home
d. leaving the water on while brushing your teeth
c. answer the following question.

Explanation:

Question 3

Global warming has natural causes (e.g., volcanic activity, orbital changes) alongside human - induced factors. Option A is wrong as it's not solely human - caused. Option B is incorrect as global warming is real (supported by scientific evidence like rising temperatures, melting ice). Option D is wrong as global warming harms many organisms, not just helping tropical ones. Option C is correct as it acknowledges the natural process aspect.

Fossil fuels (like coal, oil, natural gas) are the primary source of energy for humans, used in electricity generation, transportation, industry, etc. Homes, cars, and airplanes use energy derived from fossil fuels or other sources, but the broadest and most significant use of power is related to fossil fuels as a primary energy source. Option A (homes) and B (cars) and D (airplanes) are specific applications, while C is about the main energy source used.

Leaving water on while brushing teeth wastes water, a natural resource. Watching TV at night (A), using natural gas for heating (B, a necessary use in winter for many), and having a security light (C, may be necessary) are not as careless as wasting water which is a finite resource and this action is completely avoidable.

Answer:

C. is a natural process.

Question 4