Krishna systematically begins answering Arjuna's six-part question, starting with the first pair. He says: O son of Kunti (kaunteya), this physical body (idaṃ śarīraṃ) is definitively called and known as the field of activity (kṣetram ity abhidhīyate). And the conscious entity who understands, observes, and knows this body (etad yo vetti) is declared and called the 'knower of the field' (taṃ prāhuḥ kṣetra-jña iti) by those wise sages who truly understand these subjects (tad-vidaḥ).