। ॥ ११३ ॥
In plain words
What is handed down as the cause of that level is the net of vāsanās lying inside it. And what sets that net moving — lodged in the buddhi — is what counts here as the fourth.
Close to the Sanskrit
That which is declared to be its cause is the net of latent impressions lying within it; the cause of that net's setting into motion, having the intellect as its seat, would here be the fourth.