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.
The question is to select all that apply
Answer:
(a) Rainwater onced flow from the Canadian rockies into the crateceous interior seaway.
(d) There is evidence that the location in Gigapan image was once near a shoreline.
(e) The mean annual temperature of the location shown in the Gigapan image was once much lower than it is today
Answer: east-west
Explanation: They run east-west and they are supposed to measure the distance between the North and South of the equator
A mountain is a single standing one such a Mount Fuji. A mountain range is a chain of mountains such as the Himalayas
The correct answer is : D. Pleistocene epoch
The Pleistocene epoch lasted from about 2,500,000 years ago to 11,700 years ago. In this era, a lot of repeated glaciations happened on earth, since most of Earth's geographical surface is covered in Ice.
