A hyperbole is a figure of speech that adds emphasis by the use of extreme exaggeration. Is not meant to be literal.
Based on this definition on hyperbole, the correct answer is: It emphasizes how intense and powerful the heat is.
The author is making an emphasis on the heat and it uses hyperbole to exaggerate the intensity of it. She also tells the reader how the heat is affecting the fruit, another example of the exaggeration and extreme emphasis on it.
