The Northern European plain and lowlands of West Siberian Plains have a lot of differences in terms of their characteristics. The only similarity between the two would be the vast complex land that both of these lands have.
I hope this answered your question.
The answer should be 3a-6+14 = 3a+8.
Religious and ethnic minorities
For example, Germans and Americans have vaguely similar views towards Muslims, and many right-wing people detest African-Americans and homosexuals.
The big bang theory describes the origin of the Universe - so the theory of the Big Bang, together with what came before it is a part of the study about the Universe- so the correct answer is "the universe".
Some people hypothesize that there was another universe before the Big Bang, and some that there was nothing.