How does the ecosystem change based on mitigation

managing ecosystems in a way that counteracts anthropogenic climate change, in particular by reducing emissions of greenhouse gases and enhancing removals of greenhouse gases from the atmosphere, and ecosystem-based adaptation  managing  ecosystems in a way that uses other things

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?