Which sentence contains onomatopoeia?

The stars looks like diamonds spread across black velvet

The strange play that was her life had taken her to a fascinating new city

Each morning she awoke to the loud conversations of the Birds

She ran as fast as a cheetah as soon as she heard the snakes sinister hiss.

The sentence "She ran as fast as a cheetah as soon as she heard the snake's sinister hiss" contains onomatopoeia with the word "hiss."