Which level of government regulates international trade and trade between states?​

The U.S. Constitution, through the Commerce Clause, gives Congress exclusive power over trade activities between the states and with foreign countries. Trade within a state is regulated exclusively by the states themselves.

Explanation:

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.