Bhashya
स होवाच प्रजापतिरित्यनुषज्योत्तरम् ।यस्मात् स्वम-
In plain words
The answer's subject isn't named outright — 'Prajāpati' has to be carried over from the question. So the reply begins: 'Because, by his own...' — and there the line runs off the page.
Close to the Sanskrit
He — [namely Prajāpati, understood by] carrying the word 'Prajāpati' over [from the question] — said, in reply: 'Because by [his] own...' [the text breaks off at the page boundary]