What changes will the colonists make after the break up

They changed from the use of an unwritten constitution to a written constitution.

Explanation:

A unicameral legislature and an Executive Council was also created.

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.