Fill in the blank (_) in the following sentence from the following choices.
Sentence: It is always a noble act to donate your body to science. The _ is very practical.

Choice 1: It is always a noble act to donate your body to science. The Body is very practical.
Choice 2: It is always a noble act to donate your body to science. The Science is very practical.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.