Which innovation gave the largest contribution? In detail, explain how the inventor and invention contributed to the economic development of the U. S. and which immigrant group used the invention the most.

I choose locomotive

Select all that apply. if you lived in the olmec civilization you might have: 1) been amoung the first people on the planet to eat corn 2)worshiped a cougar deity 3)seen sculptures with downturned mouths and eyes 4)visited pyramids on a coastal island 5) made small figurines to put in trenches around the local temple