Question

how did lemuel haynes contribute to the revolutionary war? he was a founding member of the sons of liberty. he mounted legal challenges to british taxes on imports. he challenged british agents searching houses for goods. he joined a minutemen militia and fought in several battles.

Explanation:

Lemuel Haynes was an African - American who joined a Minutemen militia. Minutemen were local militia groups that were ready to fight at a minute's notice during the Revolutionary War. He fought in several battles, which was a direct contribution to the military efforts of the Revolutionary War.
The Sons of Liberty was more of a pre - Revolutionary War organization focused on protests against British rule (not specifically Haynes' contribution). Mounting legal challenges to taxes and challenging British agents searching houses were not the main ways Haynes contributed to the Revolutionary War in a military sense.

Answer:

He joined a Minutemen militia and fought in several battles.