अविद्याक्षेत्रमुत्तरेषां प्रसुप्ततनुविच्छिन्नोदाराणाम्॥४॥ avidyaakShetramuttareShaM prasuptatanuvichChinnodaaraaNaam
avidyaa= ignorance; kShetram=field; uttareShaM=of the following ones; prasupta=dormant; tanu=attenuated; vichChinna=scattered; udaaraaNaam=expanded, fully operative
"Avidya is the source of those that are mentioned after it, whether they be in the dormant, attenuated, alternating or expanded condition."
Avidya is the root-cause of the other four kleshas. Moreover, these . . . → Read More: YSP Study Group 1/22/11 – Sutra 2.4