For what purpose did England prevent the development of production in the colonies and forbid

For what purpose did England prevent the development of production in the colonies and forbid them to trade freely with other countries?

England wanted to concentrate the production and human resources of the colonies in her own hands. If she allowed them to freely develop production and trade, then soon the colonies would demand release. In addition, they could save up funds in order to be able to resist the British forces. Naturally, Britain and as an empire tried in every possible way to suppress all attempts at independence of its colonial possessions. After all, the weaker the level of development of the colonies, the easier it is to manage them.