Fill in the blank (_) in the following sentence from the following choices.
Sentence: To make your house more sustainable, you should use wind instead of coal because the _ energy is a renewable resource.

Choice 1: To make your house more sustainable, you should use wind instead of coal because the wind energy is a renewable resource.
Choice 2: To make your house more sustainable, you should use wind instead of coal because the coal energy is a renewable resource.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.