brāhmaṇa — of the brāhmaṇas;  kṣatriya — the kṣatriyas;  viśām — and the vaiśyas;  śūdrāṇām — of the śūdras;  ca — and;  parantapa —  O subduer of the enemies;  karmāṇi — the activities;  pravibhaktāni —  are divided;  svabhāva — their own nature;  prabhavaiḥ — born of;  guṇaiḥ — by the modes of material nature.

Brahmanas, kshatriyas, vaisyas and sudras are distinguished by the qualities born of their own natures in accordance with the material modes, O chastiser of the enemy.