How did spain and portugal build colonies in the americas

What impact did improvements in farming technology near the end of the nineteenth century have on the american economy? a. more energy was needed to power equipment, creating the renewable energy industry. b. less labor was necessary on farms, leading workers to pursue other jobs. c. less money was invested in farming as many locally owned farms went bankrupt. d. more demand for agricultural products reduced the price of food and animal products.

Why is james madison significant in regards to the bill of rights?

Who gave the famous "i have a dream" speech at the march on washington?