The subjects in the sentence are waves, sea, sound, and they. They collectively contribute to describing the imagery of the blue waves crashing over the jagged cliffs and creating a peaceful sound.
The subjects in the sentence are:
1. waves
2. sea
3. sound
4. they
In this sentence, "waves" and "sea" are the primary subjects, as they are the entities performing the action described in the sentence. "Sound" serves as a subject complement, providing information about the waves' characteristic. Lastly, "they" refers to the waves, acting as a pronoun representing the subject.
The sentence describes the action of the blue waves of the sea making a peaceful sound as they crashed over the jagged cliffs. Each subject plays a role in conveying the imagery and dynamics of the scene.