Why was the demand for enslaved people so high?

As soon as Europeans began to settle in America, in the early 16th century, they imported enslaved Africans to work for them. As European settlement grew, so did the demand for enslaved people. Over the next 300 years more than 11 million enslaved people were transported across the Atlantic from Africa to America and the West Indies, and Britain led this trade from the mid-17th century onwards. Ports such as Bristol, Liverpool and Glasgow sent out many slaving ships each year, bringing great prosperity to their owners. Many other cities also grew rich on the profits of industries which depended on slave-produced materials such as cotton, sugar and tobacco.

Explanation:

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.

assessment is the missing word