Answer: A) The hot sun had made the parking lot a frying pan.
Explanation: a metaphor is a figure of speech that consists in making a direct comparison between elements that aren't obviously related, in order to create an image in the reader's mind. From the given options, the one that illustrates an example of a metaphor, is the corresponding to option A, because it is comparing the parking lot to a frying pan (to explain how hot it was), without using the words "like" or "as" to make the comparison.