Explanation:

Statement 1 and 2: Gas hydrates are crystalline form of methane and water, and exist in shallow sediments of outer continental margins or Gas hydrate is a solid ice-like form of water that contains gas molecules in its molecular cavities.
Statement 3: Krishna-Godavari basin has evidence of occurrence of huge thickness of gas hydrates demonstrated by shale fracturing mechanism and world’s deep seated occurrence of gas hydrates have been sampled in Andaman basin.
Delineation of gas-hydrates by geophysical methods is very important for evaluating the resource potential along the Indian continental margin with a view to meet the overwhelming demand of energy for India.
The amount of methane potentially trapped in natural
methane hydrate deposits may be significant (1015 to 1017 cubic metres), which makes them of major interest as a potential energy resource. Catastrophic release of methane from the decomposition of such deposits may lead to a global climate change, because CH4 is more of an efficient greenhouse gas than CO2.
Gas hydrates are also important for seafloor stability studies, because "melting" gas hydrate may cause seafloor "land" slides and earthquakes and Tsunamis.
World over gas hydrate is at R&D stage. To meet the challenges of exploring gas hydrate, which is at a research stage the world over, MoPNG / DGH have signed MoU with various agencies for sharing of knowledge and scientific data.