It would be harder for us to identify all the different types of animals that lived long ago.
Answer:
Regionalization can be defined as a politico- administrative process by which regions emerge as relevant units of analysis for economic and political activity and welfare and service provision.
Explanation:
Examples of economic regionalism include free-trade areas, customs unions, common markets, and economic unions.
The downing of a U-2 spy plane by the Soviet Union
The answer is D hope this helps