Fill in the blank (_) in the following sentence from the following choices.
Sentence: The sunburn on the person's back healed more slowly than the one on their face because they applied aloe vera to the _ .

Choice 1: The sunburn on the person's back healed more slowly than the one on their face because they applied aloe vera to the face .
Choice 2: The sunburn on the person's back healed more slowly than the one on their face because they applied aloe vera to the back .
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.