What might be a cause that would break the bargain between plant and animals?

A significant cause that could break the bargain between plants and animals is habitat destruction, often driven by human activities such as deforestation, urban development, and agriculture. This destruction disrupts the ecosystems that allow for mutual benefits, such as pollination and seed dispersal. Additionally, climate change can alter the conditions necessary for plant and animal survival, leading to mismatches in their interactions. These disruptions can ultimately threaten biodiversity and the stability of ecosystems.