Final answer:
The correct statement supported by the documentary "Before the Flood" is that human-caused environmental devastation is contributing to climate change, due to the significant impact of increased greenhouse gas emissions from burning fossil fuels and other human activities.
Step-by-step explanation:
The documentary "Before the Flood" provides evidence that climate change is occurring. Among the multiple choices provided, the statement that is supported by the evidence in the video is: c) Human-caused environmental devastation is contributing to climate change.
The evidence indicated in "Before the Flood" aligns with the scientific consensus that human activities, specifically the burning of fossil fuels, have significantly strengthened the greenhouse effect, leading to global warming. The documentary highlights how altered carbon cycles and increased greenhouse gas emissions from human practices are the primary drivers of the current climate change, exceeding what natural causes alone could produce. The magnitude of warming observed today can only be adequately explained by anthropogenic influences.
However, the film also tells us that while the impact of climate change is severe, collective actions toward reducing fossil fuel use and moving to cleaner energy sources could slow down the worst effects of climate change. This negates the idea that climate change cannot be reversed by humanity, although it admits reversing the already settled major changes could be challenging.