Scientist: Conclusion There is little doubt that the ice ages were caused by the unusually rich growth of vegetation worldwide. █████ ██████████ ████████ ██████ ███████ ████ ███████ █████████ ██████████ █████ ████ ████████ ███ ██████ ███████ ██ ███ ███████████ ██████ ███████ █████ ███ ██████████ ██████ ███ █████ █████ █████ ██ ████ ██████ ███████ ██ █████████ ███ █████ █████ ██████████████ ███████ ███████ ██ ███ ████
The scientist confidently claims that the ice ages were caused by widespread, unusually rich growth of vegetation. His reasoning is that vegetation converts oxygen into CO2. CO2 retains heat. Excess vegetation caused a reduction in CO2, causing the earth to cool due to a lack of heat retention. This cooling caused the ice ages.
The conclusion is the scientist’s explanation for the ice ages: “There is little doubt that the ice ages were caused by the unusually rich growth of vegetation worldwide.”
Which one of the following ████ ██████████ █████████ ███ ████ ██████████ ██ ███ ███████████ █████████
Excessive growth of ██████████ █████████ █████ ████ ██████ ███ ██ ████ ███ ████ ██ █████████ ███ ██████ ███████ ██ ███ ███████████
If the carbon ███████ ██ ███ ██████████ ██ █████████ ███ █████ █████ ██████████████ ███████ ███████ ██ ███ ████
An excessive growth ██ ██████████ ██████ ███ ██████ ███████ ██ ███ ██████████ ██ ██ █████████
If unusually rich ██████ ██ ██████████ ██████ ███ ███ █████ ██ ███████████ ███ ██ ██ █████████ ███ ██████ ███████ ██ ███ ███████████
Unusually rich growth ██ ██████████ █████████ ███ ██████ █████████ ███ █████ ██ ███ ███ █████