In Arctic or polar climatic region,the mean temperature of the warmest month during summer season is

A display of diffused light seen in the atmosphere in polar region is

Match the following

A.Somoyeds - l Siberia

B.Yakuts - 2 Sweeden

C.Koryaks - 3 Siberia (East)

D.Sami - 4 Lena barin

In Tundra region of Scandinavia the natives are known as