Fill in the blank (_) in the following sentence from the following choices.
Sentence: The water boils well on the stove but not on the open fire, as the _ has better heat.

Choice 1: The water boils well on the stove but not on the open fire, as the stove has better heat.
Choice 2: The water boils well on the stove but not on the open fire, as the fire has better heat.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2. The water boils well on the stove but not on the open fire, as the fire has better heat.