8.3 Three of the answers Krishna speaks

अक्षरं ब्रह्म परमं स्वभावोऽध्यात्ममुच्यते
भूतभावोद्भवकरो विसर्गः कर्मसंज्ञितः

akṣharaṁ brahma paramaṁ svabhāvo ’dhyātmam uchyate
bhūta-bhāvodbhava-karo visargaḥ karma-sanjñitaḥ

The imperishable is the highest Brahman. One's own nature is called the self. The bringing forth of beings and their states is called action.

Explanation

Krishna answers three of the questions in a line each.

akṣara, the imperishable — that is the highest Brahman
svabhāva, one's own nature — that is the self
the bringing forth of beings and their states — that is karma, action

The definition of action is the surprising one. Not what you do, but the whole process by which anything comes into being at all. Action here has never meant only human effort, and this is the plainest statement of it in the book.

Word by word

śhrī-bhagavān uvācha: the Blessed Lord said
akṣharam: indestructible
brahma: Brahman
paramam: the Supreme
svabhāvaḥ: nature
adhyātmam: one’s own self
uchyate: is called
bhūta-bhāva-udbhava-karaḥ: Actions pertaining to the material personality of living beings, and its development
visargaḥ: creation
karma: fruitive activities
sanjñitaḥ: are called