Salutary neglect, the british policy to give less oversight to the colonies as long as the colonies were economically productive, led to

American Revolutionary War - Without imperial authority, the colonists were left to govern themselves. This meant that they became accustomed to self control. It also made the colonists realize that they could form a formidable force if they coalesced together. Prolonged isolation from the crown also implied that a collective identity separate from the Great Britain thrived. Ultimately, salutary neglect contributed towards the grievances that led to the Revolutionary War when GB tried to reinstate control. 

The barrier island is the answer tell me if it is correct