Base levels, plus what each job reaches at four condensing stars (light cells). The top level is 10.
WateringLv 3 out of 10→ 6★4, Lv 6 at four condensing stars
TransportingLv 3 out of 10→ 5★4, Lv 5 at four condensing stars
Condensing raises its jobs like this:
★1 +1 Watering
★2 +1 Transporting
★3 +1 Watering
★4 +1 to every job
Condense it at a Pal Essence Condenser (unlocks at Lv 14) using 4, 8, 12 and 24 more Relaxaurus for each star (48 in all). Or feed it Starfruit ☆1 to ☆4 from the Medal trader, or a Ripe Starfruit from the Bounty token exchange. The Condenser shows the new levels before you confirm.
Hauling: grabs up to 10 items from a pile per trip (Transporting 3), runs to it at 650 and carries at 150. At four stars: Transporting 5, 40 items per trip. Compare all haulers
The game picks the drop list by level: a wild Relaxaurus at Lv 70 or higher uses the World Tree list instead of the normal one, and at Lv 80 the Aura list. World Tree farming guide