What happened at lexington and concord?

The first battles of the revolutionary war

Explanation:

They happened because the British commander in Boston had heard of supplies of powder and weapons being kept by Patriots in the towns of Lexington and Concord.

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.