The correct answer is: D. Kabir
Kabir was a 15th-century Indian mystic poet and saint who is considered one of the most important figures in the Bhakti movement. He is known for his teachings on love, devotion, and the unity of all religions.
Gnanadeva was a 13th-century Indian saint and philosopher who is considered one of the founders of the Varkari sect of Hinduism. He is known for his teachings on devotion to Vishnu and the importance of bhakti yoga.
Namadev was a 13th-century Indian saint and poet who is considered one of the founders of the Varkari sect of Hinduism. He is known for his devotional songs and poems, which are still popular today.
Ekanatha was a 16th-century Indian saint and poet who is considered one of the most important figures in the Bhakti movement. He is known for his teachings on love, devotion, and the unity of all religions.
All four of these figures were important religious leaders in India, but Kabir is the one who is most closely associated with the gospel of love. His teachings on love and devotion have had a profound impact on Hinduism and other religions around the world.