Why so most people in the four countries we studied live in urban areas? Urban areas always have a warm tropical climate.

There are more jobs in the factories and businesses of the cities.

Urban areas have more arable land in these countries.

Economic reasons, such as quality of housing and cost of living are other common reasons for relocating from a rural to an urban area. Education is also a large factor. Urban areas have more opportunities for employment, especially in competitive, progressive industries, such as computers, technology and high-level corporations.

Explanation:

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.