Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: A pot of cold water was heated on a stove until the water boiled. Which of the following best explains why the water was able to boil?
The cold water absorbed heat from the pot.
Heat was applied, raising the temperature above the boiling point.