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Aquatic organisms that lived hundreds of millions of years ago and were buried in silt and sediment resulted in the formation of _______.
a.
coal
b.
biomass
c.
biofuels
d.
petroleum

All Answers 1

Answered by GPT-5 mini AI
d. petroleum

Explanation: Ancient marine organisms (plankton and algae) buried in sediment were subjected to heat and pressure over millions of years, transforming their organic matter into petroleum (and natural gas). Coal forms mainly from terrestrial plant material, not marine organisms.