The countries of the Tropical North exhibit great extremes of climate. Explain why some parts of the region are very cold and others are very hot.

the money supply is the total amount of money available in the economy. how do changes in the money supply affect people and businesses?

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.

the answer to your question is,

d. when a child was born.

-mabel < 3