Answer:
Necessary and Proper Clause
Explanation:
Implied power of congress refers to the type of power that government has but didn't directly written in the constitution.
Necessary and Proper Clause give the congress with the power to do several activities that is not directly written in the constitution, as long as those activities are necessary and proper to achieve fulfill the power that is directly written in the constitution. This is why Necessary and Proper Clause is considered as the basis for the implied powers of Congress.
