Questions

Junko Tabei is the first woman to climb Mount Everest and she reached the summit of the world's highest peak in 1975

It is due to the deficiency of Vitamin A. Retinol which is present in vitamin A. Its deficiency causes night blindness. It is available in carrots. 

Molten rock inside the earth is called Magma.

The main source of organic matter in soil is the plant and animal tissue that decompose at each level of breakdown.

In the early 20th century, the Balkans were called a "powder keg" because the political situation in the region was very unstable. For a long time, the Ottoman Turks occupied the balkans, and with the rise of nationalism, some balkan states declared independence.