Matched economic bases to definitions: population, development, system, resources.
Based on the image you sent, the following are the correct pairs:
Definition - Basis for classification of economies
Size of the economy - Size of the economic population (number of people)
Level of economic - Industrialization, urbanization, and per capita development income
Economic - Ownership of the means of production and system distribution
Natural - Availability of natural resources such as land, resources water, and minerals
Here is a brief explanation of each pair:
Size of the economy and size of the economic population: A larger population typically means a larger economy, as there are more people to produce and consume goods and services.
Level of economic development and industrialization, urbanization, and per capita income: Countries with a higher level of economic development tend to be more industrialized and urbanized, with higher per capita incomes.
Economic system and ownership of the means of production and distribution: In a capitalist economy, the means of production and distribution are privately owned, while in a socialist economy, they are owned by the government or the people.
Natural resources and availability of natural resources: Countries with abundant natural resources tend to have stronger economies, as they can export these resources or use them to produce goods and services.