Final answer:
Jonas gets a burst of energy from the release of potential energy when climbing the hill.
Step-by-step explanation:
When Jonas climbs up the hill, he gets a burst of energy from the release of potential energy accumulated during the climb. This potential energy is stored in his body and is converted to kinetic energy as he climbs. As he pushes himself up against gravity, the potential energy increases, and when he descends, the potential energy is released and contributes to the burst of energy.