kasmāt tadrūpaprakṛtitvāt teṣāṃ tadrūpā viśiṣṭasahakārikṛtaviśeṣakāraṇajanyā prakṛtiḥ svabhāvo yeṣāṃ te tathoktāḥ /
[Question:] "How so?" [Answer:] Because their nature is of that character—they whose nature (prakṛti) is produced by particular causes brought about by specific auxiliary [conditions] are described thus.