Question

question:
____ energy sources are formed by geologic processes acting over millions of years,
while ____ fuel sources are created or replaced much faster.

answer options:
select one of four
renewable, nonrenewable nonrenewable, renewable
solar, fossil wind, solar

Explanation:

Nonrenewable energy sources (like fossil fuels) form over millions of years via geologic processes. Renewable energy sources (like solar, wind) are replenished much faster. So the correct pair is Nonrenewable for the first blank and renewable for the second.

Answer:

B. Nonrenewable, renewable