What are the differences between a public charity, a private operating foundation, and a private foundation?

What are the legal disadvantages of a private foundation?

Define the three principal types of charitable organizations that are public charities? What characteristic(s) cause them to be public charities and not private foundations?

What are the differences between a donative charity and service-provider charity?

What is a supporting organization? Give an example(s) of a supporting organization.

What is a disqualified person? Give an example.

This is for nonprofit law exempt status United States