The four types of galaxies are spiral, barred spiral, elliptical, and irregular <span />
Mansa Musa. the pilgrimage journey exposed Mali to Europe and the Middle East. The king had carried 30,000 pounds of gold, which signified the immense wealth in his empire. This created an impression on his acquaintances.
Answer:
D. Legumes
Explanation:
These plants will fix nitrogen into the soil, and are a natural fertiliser.
Answer:
Shilaidaha Kuthibadi (Bengali: শিলাইদহ) is a place in Kumarkhali Upazila of Kushtia District in Bangladesh. The place is famous for Kuthi Bari; a country house made by Dwarkanath Tagore. Rabindranath Tagore lived a part of life here and created some of his memorable poems while living here.
Explanation:
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.
