The most populous country is China and its population is 1,379,302,771.
Niger and Congo are two rivers after which countries are named (actually in both cases two countries each) - and those are African countries, so they must be in Africa.
Zambezi is a river in Angola and Namibia.
Tigris is a River in Mesopotamia, in Asia - so that's the correct answer!
They have created agencies. Those agencies created rules and regulations to stop the flow of pollution, etc.
Explanation:
is there multiple choice answers? if there is can u add a picture of the answers