Question 2: The concept which would be used to inform the reader is the following one:
The locations of summer camps.
It is concrete information, objective and straightforward. All it does is inform the reader about where to find summer camps. The other alternatives are more abstract and can even be subjective and relative. In other words, they are too complex to be regarded as simple information.
Question 3: The concept which would be used to explain something to the reader is the following one:
Booking a hotel room.
It is about how to do a certain thing, that is, it provides the reader with an explanation on how to book a hotel room. It is direct, straight to the point, whereas the other alternatives present instructive and not instructional topics.