Final answer:
Autumn Rhythm (Number 30) by Jackson Pollock is an abstract artwork that captures the motions of painting through spontaneous brushstrokes.
Step-by-step explanation:
The subject of Autumn Rhythm (Number 30) by Jackson Pollock is abstract art. It does not depict objects or subjects from the real world. Instead, it represents the motions of painting, capturing the artist's spontaneous and unpremeditated brushstrokes. Pollock used a technique called drip painting to create this artwork, where he would pour, drip, and fling paint onto a canvas placed on the floor, allowing the paint to flow and spread naturally.
Learn more about Abstract art