(D) They are rare as they are found deep in the ocean they are very dangerous when they do go off though like the san andreas fault which was where one transform plate boundary earthquake went off killed over 600 people, that gets rid of B and A, and they were even erupting over 10 million years ago which gets rid of C and gives you the answer D.
Answer: The release of methane from thawed permafrost
Explanation:
With increasing global warming, permafrost in the arctic is melting. The carbon and methyl clathrates present in permafrost escape into the atmosphere to form carbon dioxide and methane, both greenhouse gases.
In the Arctic, molecules of methane are trapped in ice crystals as methyl clathrates. When the temperature increases, these crystals release methyl clathrates which become methane when in contact with the atmosphere.
The cause of the increasing atmospheric 
is due to the the thawing of dead organisms present in the permafrost. As the permafrost melts, these organisms decay and release into the atmosphere.
You made an account for brainy. That’s your most interesting discovery.
Pro: Goods Became More Affordable and More Accessible. ...
Pro: The Rapid Evolution of Labor-Saving Inventions. ...
Pro: The Rapid Evolution of Medicine. ...
Pro: Enhanced Wealth and Quality of Life of the Average Person. ...
Con: The Rise in Unhealthy Habits
Con: Poor Working Conditions
Con: Pollution and Other Environmental Ills
A tributary is a source of water for creeks and is one of the few starts of the water system. It would be d
