They mostly grew wheat, barley, oats, rye, and corn. because of this, they were basically known as the "Breadbasket". So I believe your answer would most likely be wheat.
He wanted to use the Mississippi for trade
Answer:
Social psychology has lots to offer the study of protest. Exploring the causes of feelings and actions – and how these are influenced by social context – helps identify a number of important factors that explain protest actions, including grievances, efficacy, identity and emotions.