That crop would be Tobacco due to the fact that John Rolfe brought tobacco seed from the West Indies (which was the main supplier to tobacco users in Britain.) to Jamestown.
Explanation: The Virginia Company of London was looking for the Jamestown colony to earn a lot of money and found in tobacco a very commercial crop for this company. John Rolfe was the first settler of James Town who planted tobacco and took it to England. Pocahontas served as a contact between the natives and the English, the natives taught the colonists how to plant tobacco.
The addition of Bill of Rights made Virginia and New York finally agree to ratify the constitution. Originally, there were 13 states that needed to ratify the constitution. Hope this answer helps.