Explanation:
A form of "gathering" federalism where different states come together to form a nation. Each state has its own power and is free from central interference.
This system is adopted by Switzerland, the United States of America. While in the form of the "Together Hold" federation, the centre forms
smaller states for better governance and control of the state. This system is applied in countries such as India, Belgium and Spain.
Final Answer:
Hence, the correct option is (D) i.e, Switzerland.
