Answer:
The message from the Ranger Naturalist Service pamphlet is an invitation by the agency to people to become interested in participating in the activities and events proposed by them in Lassen Volcanic National Park. In fact, the pamphlet, aside from showing what the picture refers to, whose ad it is, and what agencies are behind this institution and the entire list of services, makes an open invitation, almost like a temptation, for tourists to choose to visit the Park under the Ranger Naturalist Service guide. Although the pamphlet attempts to portray an attractive, and interesting site, and wishes to generate a desire in the public so that tourists will sign on with them, the colors used, and the picture of the active volcano, rather sends a threatening message to the public, almost like showing a place where nature can be dangerous. Also, the color scheme used, to me, does not help to convey the appropriate message.
In media like this one, where the attempt is to invite people, interest them in services offered, I think that coloring, and especially pictures, become really important. So the colors, to me, should have been more natural, and it would have been important to use a picture of a volcano that is not spewing up ash and cinder into the sky. These things, aside from titles, and words used, convey messages much faster than anything else.