Final answer:
William Blake emphasized imagination and emotion in his art during the early 19th century as a reaction against rationalism.
Explanation:
William Blake was the early 19th-century artist who reacted against the rationalism of his time by emphasizing imagination and emotion in his art. He was a prominent figure in the Romantic movement, known for his expressive and symbolic artworks that focused on personal imagination and creativity. Blake's work stood out for its emotional depth, vibrant colors, and rejection of traditional norms, aligning with the principles of Romanticism.
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