Question

(1) the nation’s energy use is largely dependent on fossil fuels. (2) these fuels are nonrenewable resources, and they cause pollution. (3) we cannot continue our reliance on a fuel that will eventually run out. (4) thus, we must find other ways to sustain our energy demands. (5) pursuing alternative fuel sources is the key to solving our energy crisis.

(6) currently, about 1 percent of energy in the united states is produced by the sun, and solar energy has the potential to become a more widely used energy source. (7) through different technologies, such as solar cells, scientists have learned to use the sun’s radiation to create electricity. (8) solar energy is both inexhaustible and clean. (9) the major limit to this alternative source is that equipment is expensive. (10) developing a cost-effective way to harness the power of the sun will be a significant development in solving our energy crisis.

which sentence contains evidence that solar energy could help solve the energy crisis?
○ sentence 5
○ sentence 6
○ sentence 8
○ sentence 10

Explanation:

To determine which sentence provides evidence that solar energy could help solve the energy crisis, we analyze each option:

• Sentence 5: States that pursuing alternative fuels is key, but no specific evidence about solar energy's capabilities.
• Sentence 6: Mentions current solar energy usage and its potential for wider use, but does not directly address how it helps solve the crisis (e.g., being inexhaustible/clean).
• Sentence 8: States solar energy is "inexhaustible and clean". Since the energy crisis is partly due to reliance on non - renewable, polluting fossil fuels, a fuel that is inexhaustible (won't run out like fossil fuels) and clean (doesn't cause pollution like fossil fuels) provides evidence that it can help solve the crisis.
• Sentence 10: Talks about developing cost - effective ways to harness solar energy, not about the inherent qualities that make it a solution.

Answer:

C. sentence 8