Refer to the Department of Energy's "Guide to Renewable Energy."

What is the author's purpose in mentioning the types of renewable energy systems?

A. to describe how each energy system is installed
B. to compare renewable systems to see which one works best
C. to prove that renewable energy systems work effectively to save energy and money
D. to introduce three systems homeowners can install to save energy and money



Answer :

Final answer:

The author mentions the types of renewable energy systems to demonstrate their effectiveness in saving energy and money.


Explanation:

The author's purpose in mentioning the types of renewable energy systems is to prove that renewable energy systems work effectively to save energy and money. By discussing the different types and their advantages and disadvantages, the author aims to highlight the benefits of utilizing renewable energy sources over traditional nonrenewable sources.


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