1v.247 "What is the source of light in the world?
What in the world is the wakeful one?
What are the colleagues of those living by work?
What is one's course of movement?

2v.248 "What nurtures both the slack and active
Just as a mother nurtures her child?
The creatures who dwell on the earth—
By what do they sustain their life?"

3v.249 "Wisdom is the source of light in the world;
Mindfulness, in the world, is the wakeful one;
Cattle are the colleagues of those living by work;
One's course of movement is the furrow. [n.139] I interpret pāda c, in both the question and the reply, with the aid of Spk, which paraphrases only the reply: Gavo kamme sajivanan ti kammena saha jivantanaṁ gavo va kamme kammasahaya kammadutiyaka nama honti; "For those who live together with work, cattle are called the work-companions, the work-partners, in work; for the work of ploughing, etc., is accomplished along with a team of cattle."
in pāda d, sitassa (Ee2: sita 'ssa) should be resolved sitaṁ assa. Spk takes assa to refer to "the mass of beings" (or of people: sattakayassa) and explains iriyapatha, "the course of movement" (or "mode of deportment"), as the means of livelihood (jīvitavutti); it glosses sita (furrow) with naṅgala (plough). The purport is that the activity of ploughing is the essential means for sustaining human life.

4v.250 "Rain nurtures both the slack and active
Just as a mother nurtures her child.
Those creatures who dwell on the earth
Sustain their life by rain."

1"Kiṁsu lokasmi pajjoto,
kiṁsu lokasmi jāgaro;
Kiṁsu kamme sajīvānaṁ,
kimassa iriyāpatho.

2Kiṁsu alasaṁ analasañca,
Mātā puttaṁva posati;
Kiṁ bhūtā upajīvanti,
Ye pāṇā pathavissitā"ti.

3"Paññā lokasmi pajjoto,
sati lokasmi jāgaro;
Gāvo kamme sajīvānaṁ,
sītassa iriyāpatho.

4Vuṭṭhi alasaṁ analasañca,
Mātā puttaṁva posati;
Vuṭṭhiṁ bhūtā upajīvanti,
Ye pāṇā pathavissitā"ti.