Step 1: Context.
The metaphor here compares love to fire, which burns and chars.
Step 2: Option Analysis.
(A) Water: Incorrect.
(B) Fire: Correct.
(C) Spark: Too small, not fitting "charred wings."
(D) Emotion: Too abstract.
Step 3: Conclusion.
Correct answer is (B) Fire.
“One of these days you’re going to talk yourself into a load of trouble,” her father said aggressively. What do you learn about Sophie’s father from these lines? (Going Places)