Explanation:

Amir Khusrow was a Sufi mystic and a spiritual disciple of Nizamuddin Auliya. He lived for 72 years, out of which 60 years he lived in the courts of as many as ten different rulers of the Delhi Sultanate. He was a poet as well as prolific musician. His primary language to write poems was Persian but he composed almost half a million verses in Persian, Turkish, Arabic, Braj Bhasha, Hindavi as well as the Khadi Boli. His Khaliq-e-bari, which is known as oldest printed dictionary of the world deals with Hindi and Persian words. He is regarded as the “father of qawwali”. He is also credited with enriching Indian classical music by introducing Persian and Arabic elements in it, and was the originator of the khayal and tarana styles of music. Khayal later reached to its zenith during the times of Mohammad Shah Rangile and today is integral part of Hindustani classical music. His association with various sultans enabled him to travel and stay in various parts of India and this gave him exposure to various local traditions. This helped him to assimilate diverse musical influences. He was patronized by three Khilji rulers successively.