A type of constitution suitable for the governance of a federal state is a

Explanation

A rigid constitution is one that is difficult to amend because it requires a special procedure or approval from multiple levels of government. This type of constitution is suitable for federal states because it ensures that the division of powers between the central government and the states is protected from frequent or arbitrary changes. It provides stability and safeguards the autonomy of the constituent states. In contrast, a flexible constitution is easier to amend and might not provide the same level of protection for the federal structure.