Réponse:

the major economic activities in the New England colonies were the trade that was important for the economy, though whaling, trapping, and farming also played a vital part. first, the subsistence farming is only growing enough food to feed the farmer’s family. The southern colonies got rich by growing cash crops because they had a suitable climate. Due to the unsuitable climate and geography, colonists could not afford large-scale farming. So they relied on subsistence farming and raising livestock. They only grew enough to feed their families and had little to no surplus. 

They made money by trading the fur and meat of the livestock on their farm. Secondly,

there was a huge supply of timber due to the large forests. This made it easy for the lumber industry to grow, and iron mining was also rising in the north. Iron ore and wood are the two most vital things for building ships and boats. So, the shipbuilding industry flourished, and there was a boom in trading and fishing. Third, the triangular trade was extremely lucrative, which attracted many colonies to it. It was also known as the Atlantic slave trade. The raw materials (sugar, cotton, etc.) were exported to New England towns, which exported the manufactured goods (guns and textiles) to Africa in exchange for enslaved people. The New England colonies bought slaves from Africa in return for rum and sold the slaves to the West Indies in exchange for molasses. This is how many New England shippers and traders got rich. Finally, with the Atlantic ocean at their disposal, fishing and whaling became the main economic activities in the north. This particular industry was largely dependent on the ocean. The New England colonists made a living by selling fish and whale products. The most common types of fish were cod, halibut, mackerel, herring, etc. Whale products such as whale oil were also valuable.