Methane hydrates are a. a potential new source of natural gas b. the largest reserve of methane on earth c. releasing methane as the arctic warms d. all of the above

Methane Hydrates are all of the above.
- It is a potential new source of natural gas.
- It is also the largest reserve of methane earth.
- And It is releasing methane as the arctic warms.
Arctic methane releases methane from soil and seas. 

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Answer;

All the above

Methane hydrates are;

A potential new source of natural gas The largest reserve of methane on Earth Releasing methane as the arctic warms Explanation;Methane hydrates are compounds that are crystaline solid in nature and are composed of water and low molecular weight gases mostly, methane gas. They form under low temperature, high pressure and appropriate concentrations of methane gas.Methane hydrate deposits are the largest hydrocarbon resource than oil, natural gas, and coal resources.Most methane hydrates deposits contain small amounts of other hydrocarbon hydrates.

Holozoic nutrition refers to the regular animal nutrition mode whereas saprophytic nutrition refers to the nutrition mode of fungi and bacteria.