When the president puts together a team of people to head-up the top positions in executive departments and agencies, this is an example of the president performing which role?

Chief Executive

Explanation:

Based on the information provided within the question it can be said that in this scenario the president is performing the role of Chief Executive. This is role as the authority to appoint and remove executive officials, as well as implementing policy, preparing executive budgets, and even supervising the  executive branch of government.

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.

i believe your answer is mountains.