Federal power.
implied
Commerce
reserved
E-Commerce or Electronic commerce.
adverbial clause
dependent clause
Inherent Power
It is a National Power.
Commerce is the distribution production of buying and selling of goods and services
You don't give the clause so there is no answer.
elastic clause
This is a type of introductory clause that is called a dependent clause. It is basically one that help to provide some background information.
A conditional clause.