How can a tax on foreign sugar and imports encourage trade in england

The Sugar Act was a measure taken by England against its colonies, prohibiting the consumption of any sugar that had not been produced by the English Empire, which in effect functioned as a settler tax.

The Sugar Act required settlers to pay a tax on any shipment of sugar that was not owned by the British colonies. With this, the autonomy of the colonists began to be threatened.

you should think about the answers you give and expect the same form your questions.