Answer:
D. They use less fuel than conventional ovens.
Step-by-step explanation:
In the article, the writer talks about the advantages and disadvantages of solar ovens. Solar ovens are different from the conventional ovens. They use solar energy from the sun and helps in preparing the food. They do not form any type of pollution and helps in conserving the natural sources. Preparing food in solar ovens can help in saving electricity and wood. They can also be prepared by using some of the household gadgets.