Why did the british parliament pass the proclamation of 1763?

The British government did not want American colonists crossing the Appalachian Mountains and creating any type of problems with the French and Native. so they issued the Royal Proclamation of 1763, which declared the boundaries of the thirteen colonies as the Appalachian Mountains.

bujías y una hora antes y no me parece muy difícil

the answer to your question is a because laws act as guidelines as to what is accepted in society. without it there would be conflicts between social groups and communities. it serves as a norm of conduct for citizens.