Which of the following sentences contains a figure of speech
1. The sun was shining brightly on the water.
2. She was as slow as a turtle when it came to making decisions.
3. The mountain peak seemed to touch the sky.
4. He had a big heart and always helped those in need.
Sentence 2 contains a figure of speech, as it uses a simile ("as slow as a turtle") to make a comparison between two things.