What term describes the preservation of some of the states' powers but the relegation of others to the national government?

Federalism

Explanation:

Federalism may be defined as the mixed form of the government or compound form which combines the general government with the regional government in single political system.

It is the system of government where the power is being divided between national government and the other states' government. It is opposite to the unitary form of government.

Thus federalism describes the preservation of some powers of the states but relegation of other power to the national government.

good question. i'll be looking into that. (this is a joke sir)

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.