I think it would be choice B
Answer:
Slavic people
Explanation:
Russia has a population of over 185 ethnic groups. Many people regard themselves as Russian or Tatars, while others classify themselves as Samis or Kets. All these groups had an influence on Russia's culture but the Slavic ethnic groups are the major ethnic group. The Slavic people are Indo-European people who speak the Slavs language. The Slavs are traditionally divided into two in terms of Religion namely Eastern Orthodox and Roman Catholic Church.
Answer:
78 percent - nitrogen
21percent- oxygen
absorbs ultraviolet-ozonosphere
atmospheric weather-stratosphere
starts seven miles -troposphere
layer composed 0f layers- thermosphere
important fr radio wave-ionosphrere
trapping of heat- green house effect