Take a look at the item again:
My appliances are always hungry. (A)
For example, the dryer will eat underwear,
(B) and the microwave
will suck off half a frozen dinner
(C) while it is cooking.
You wanted to do this:
My appliances are always hungry. For example, the dryer will eat
underwear and the microwave will suck off
half a frozen dinner while it is cooking.
Removing the comma after underwear is an error. You have two main clauses joined by and. In such a situation, use a comma before the and.
You might want to review the rules.
Go back to the sentence to try again.