The river did not jump over the mountain because rivers cannot jump over mountains that’s is fake that is fake news and that defies to law of gravity
Given that Carla has already knowledge of the example from the Ecology textbook, then her reading will increase. It is called a prereading, it is a technique in which the reader will skim the text before reading it thoroughly.
Carla already has an idea on what she will be ready since she has come across the example before reading the text carefully.