Fill in the blank (_) in the following sentence from the following choices.
Sentence: The knife punctured the throat while deflecting off the bone, since the _ was softer.

Choice 1: The knife punctured the throat while deflecting off the bone, since the throat was softer.
Choice 2: The knife punctured the throat while deflecting off the bone, since the bone was softer.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.