Which of the following is generated in place, on the spot where we find them?

Question

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Hydrogenous (or authigenic) sediments are generated in place, on the spot where we find them, through chemical reactions between the seawater and sediments already present. Terrigenous sediments are transported and deposited by wind or water, biogenous sediments are formed from the remains of marine organisms, and cosmogenous sediments are extraterrestrial in origin and fall to Earth.

Which of the Following Is Generated in Place, on the Spot