Answer:
An index fossil is a fossil used to determine the age of the sediments in which it is found. When quickly approximating the age of new finds, an archaeologist looks at the rocks in which it is buried, as those sediments would have been on the surface at the time of the death of the pre-historic creature.
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A is or c is the correct answer
generate energy by photosynthesis
1. Hydropower
2. Solar
3. Coal
4. Oil
5. Biomass
