What was the effect of the change from hand power to machine power in industry? 1. it lead to the development of the automobile and airplane. 2. the northeast remained the leading industrial region. 3. business moved out of homes to the factory.

3. Business moved out of homes to the factory.

Explanation:

An effect of the change from hand power to machine power in industry is business moved out of homes to the factory.

a is correct

hope this let me know if it is right

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.