Tourism and oil drilling are definitely not traditional activities, rather they are modern activities that started with the spread of the technology - they can't be the correct answer.
Traditionally, people from central Asia were leading rather a nomadic lifestyle and were tending to life stock - the correct answer is B
Answer:
Technically, there are 197 countries in the world.
Hope it helps:)
Antarctica has the smallest population
Air mass, letter a is the correct one