I'm am unsure what context the answer needs to be in or how specific they need to be. Minerals are used in most building supplies, fertilizers, cooking ingredients, and machinery.
Answer:
They are different forms of government.
Explanation:
- A unitary system is a centralized form of system and we're all powers that are held by the same government and consist of a single agency like great Britain.
- In a federal system, the powers are divided between the center and the local government. like the U.S Canada, Switzerland and India.
- A confederation is an alliance of independent states or nations. Like the European Union.
It was the most accurate calendar of the time!