The correct answer is "They advise the President on policy matters". Independent executive agencies are technically part of the executive branch, but the are not directly controlled by the President of the United States and they do not advise the President. The Executive Office of the President (EOP) are the agencies that advise the President in policy matters.
DiMaggio and Powell, they pose the mechanisms of coercive, normative and mimetic, through which the institutional effects of an area that they call organizational field and to which they define like those organizations that, together, constitute a Recognized area of institutional life.
In situations where a clear course of action is indispensable, when the technologies are poor, when the goals are ambiguous, the answer to all this is to imitate, to be successful.
Isomorphism poses a very serious problem for innovation and adaptation of organizations.
For individual workers is an even more complex issue, for example: Two people who sell apples every morning on the same street implies a decrease in sales of both, a decrease in the variability of products for the public and again, a lack of Originality.