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Explain why the marginal propensity to save and the marginal propensity to consume sum to 1.
Advancing Warm Air Mass
A body of warm air that moves into an area previously occupied by cooler air.
Grazing Mammals
Grazing Mammals are a group of mammals that primarily feed on grasses and other ground-level vegetation, playing a key role in ecosystems by shaping vegetation structure.
Occasional Fires
Fires that happen sporadically in ecosystems, which can play a natural role in shaping vegetation patterns, nutrient cycling, and habitat structure.
Grasslands
Vast open areas dominated by grasses, used for grazing, and can be found in various climates around the world.
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