What first developed in Virginia because of the need for labor on the plantations?

Explanation:

The plantation system developed in the American South as the British colonists arrived in Virginia and divided the land into large areas suitable for farming. Because the economy of the South depended on the cultivation of crops, the need for agricultural labor led to the establishment of slavery.

where is the

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail