Suppose a lion eats the found carcass of a dead wildebeest instead of hunting a live wildebeest what ecological principle does that event show

The event shows A species may participate in more than one trophic level.
When a lion choose to consume animals that already dead, the energy level that the lion consumer would significantly lower compared to the energy level that it would get from consuming the animal directly. Becase of this, we could say that it participate in different trophic level.