Prabhuji explains the answer of the Yogendra - Karabhajana Rsi. Karabhajana Rsi explains the features of the four incarnations during Satya Yuga, Treta Yuga, Dvapara Yuga, and Kali Yuga. The famous sloka, "krsna varnam tvisakrsnam" is explained, which depicts the appearance of Sriman Caitanya Mahaprabhu and His associates.
kṛṣṇa-varṇaṁ tviṣākṛṣṇaṁ
sāṅgopāṅgāstra-pārṣadam
yajñaiḥ saṅkīrtana-prāyair
yajanti hi su-medhasaḥ
--Srimad Bhagavatam 11.5.32
["In this Age of Kali, people who are endowed with sufficient intelligence will worship the Lord, who is accompanied by His associates, by performance of saṅkīrtana-yajña."]