Wright 10 pros for the middle colonies

Fact 1 - Geography: The geography of the Middle Colonies had a mix of the New England and Southern features but had fertile soil and land that was suited to farming
Fact 2 - Natural Resources: Good farmland, timber, furs and coal. Iron ore was a particularly important natural resource
Fact 3 - Religion: Not dominated by a specific religion which gave way to religious freedom for Quakers, Catholics, Lutherans, Jews and others.
Fact 4 - Climate: The Middle Colonies had a mild climate with warm summers and mild winters
Fact 5 - Trade / Exports: The Middle Colonies were the big food producing region that included corn and wheat and livestock including beef and pork. Other industries included the production of iron ore, lumber, textiles, furs and shipbuilding - refer to Colonial Times and Colonial Society.

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

explanation:

productive can also mean:

producing or giving rise torelating to or engaged in the production of goods, crops, or other commodities.

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