The correct answer should be flowing water
Grass prevents erosion and dams prevent water from flowing.
Pre-disaster planning saves lives.
Is this a question or ? explain a bit more.
The central idea that was centered on the argument is the importance of freedom and that the free government had authority.
<h3>What is a central idea?</h3>
A central idea simply means the main idea that's can be found in a literary work. It's what the author wants the readers to know.
In this case, the central idea that was centered on the argument is the importance of freedom and that the free government had authority.
Learn more about central ideas on:
brainly.com/question/2685713