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Which of the following is the correct explanation with respect to Petrifaction?

Process of fossilisation in which dissolved minerals replace organic matter
Process of accumulation of toxic substances along the food chain
Process of removal of toxic substance through use of bacteria
Process of rearing earth worms.
Explanation:

Petrifaction is the process of fossilisation in which dissolved minerals replace organic matter. A 20 million year old fossilised tree was discovered on the outskirts of Himachal Pradesh and saved from destruction. It is said that the discovered fossils dated back to paleo flooding that was related to global warming and glacial melt, resulting in floods.
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