The behavior that can end up being more harmful than helpful is:
Iguanas and tortoises eat leaves, fruits, and flowers, relying on each as important seasonal food sources.
This behavior can be harmful because if these animals overconsume certain plants, they may deplete those resources, potentially harming the plant population and disrupting the ecosystem. In contrast, the other behaviors, such as pollination by insects and seed dispersal by birds, typically benefit plant reproduction and survival.