The Nayanars, a collective of Tamil devotees, were committed to the adoration of Lord Shiva. From the 7th to the 9th centuries AD in South India, they played a crucial role in the Bhakti movement. This movement was defined by fervent, heartfelt devotion to a personal deity, and the Nayanars selected Shiva as their chosen god. Their profound reverence was articulated through devotional songs and verse, which subsequently became a significant contribution to Tamil literary works.
Consequently, the correct response is Shiva.