Why did they close the Boston harbor?

The Boston harbor was closed by the British Parliament in response to the Boston Tea Party, a protest against British taxes and policies. On December 16, 1773, a group of colonists disguised as Mohawk Indians boarded British ships in the Boston harbor and dumped 342 chests of tea into the water. This act of defiance was sparked by the Tea Act, which gave the British East India Company a monopoly on the sale of tea in the colonies and allowed them to bypass colonial merchants. In retaliation, the British government passed the Coercive Acts, also known as the Intolerable Acts, which included the closure of the Boston harbor until the tea was paid for and the colonists submitted to British authority.