Fossils are the preserved remains or traces of animals, plants and other organisms from the remote past. Fossils of sea organisms that no longer exist are sometimes found in high mountain areas. How do scientists explain these discoveries?

A new climate caused an ocean to disappear.

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The mountains were lifted from low, wet areas.

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The fossils were carried there by flowing rivers.

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The samples were left behind from volcanic eruptions.

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Solution

The correct option is A A new climate caused an ocean to disappear.
Earth's crust is prone to changes in the course of time. The movement of tectonic plates and their collision can give rise to mountains (eg: Himalayas) making sea bed rise up. Also, great floods also can make fossils of sea animals appear above a mountain.

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(c) Explain how, sun is considered to be the ultimate source of fossil fuels.
(d) Which fossil fuels were formed by the buried remains of small plants and animals?
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