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1 vote
Man's first attempt at industry depended on ______ as a source of energy.

a.) coal
b.) steam
c.) water
d.) oil

User JBeagle
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2 Answers

2 votes
i believe it’s coal. yes
User Or Sharir
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5 votes

Answer:

coal

:)

Step-by-step explanation:

User Yuriy Goldshtrakh
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