What event was influential in the British retreat from Boston?

Question

General Washington's cannon attack from the hillside outside of the of the city.
General Washington's crossing of the Delaware River, threatening British positions.
The British defeat at Lexington and Concord.
The American invasion of Massachusetts.

Answer 1

The event that was influential in the British retreat from Boston was General Washington's cannon attack from the hillside outside of the city. This involved the strategic placement of cannons on Dorchester Heights, which ultimately posed a significant threat to the British forces in Boston and led to their decision to evacuate the city in March 1776.