Know rajo-guṇa to be in the nature of desire and passion. It springs from greed and delusional clinging. It binds one (the embodied being), O son of Kunti, through clinging to ceaseless activity.
Sattva-guṇa alone will not be able to constitute life and living. It needs the close partnership with rajo-guṇa and tamo-guṇa. All the three go together, co-exist and cofunction. In fact, there is nothing like a unitary existence or expression. Everything is conjunctional.
Hunger is felt in the stomach. But the need and desire to eat spring from rajo-guṇa. Rajo-guṇa also causes a variety of tastes for food items. Thus, desire is the cause motivating one to various kinds of activity. But for rajo-guṇa, everything will be in a standstill in the world. It is through rajo-guṇa that Nature keeps everyone active ceaselessly. There is nothing stationary in Nature.
Each guṇa thus has its place of distinction as well as role. Like sattva-guṇa, rajo-guṇa also causes bondage. It is through the urge for being active and the need to resort to various activities throughout the day, being motivated by various desires.