Answer:
Correct answer is The Ural Mountains.
Explanation:
The Caspian Sea is not correct answer as sea is marked with blue color.
The Sayan Mountains are more to the east, closer to the border with Mongolia.
The Caucasus mountains are between Caspian and Black Sea and that also is not correct.
Therefore, the only correct answer is Ural, as this mountains are also natural border between Europe and Asia.
DescriptionInternational trade is the exchange of capital, goods, and services across international borders or territories because there is a need or want of goods or services. In most countries, such trade represents a significant share of gross domestic product. Wikipedia
The altitude and climate change
I think you forgot to give the choices along with this question. I am answering the question based on my research and knowledge and hope that it comes to your help. The Serengeti is the most famous in the Great Plains region of Africa. I hope that this answer has come to your help.