The correct answer is "hace." First the correct verb must be chosen. With expressions of weather in Spanish, the verb "hacer" is used. Then we are left with "hace" and "haga." Even though there is a "que" introducing a new clause in the sentence, the indicative is used, because there is no emotion or doubt expressed in the first clause; therefore, "hace" must be used.

The sentence utilizes a "si+indicative" construction, so the verb that goes in the blank must be in the indicative mood. In the context of the statement, the indicative first person present form, "pido" (I ask for ) makes the most sense.

English translation: "If I have offended you, I sincerely ask for your pardon."