The two factors that increase the heat absorbed by a land surface are:
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Becoming paler: A paler surface reflects more sunlight and absorbs less heat, so this factor actually decreases heat absorption, not increases it.
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Removing plants: This can lead to increased heat absorption because vegetation generally has a cooling effect through processes like transpiration. Without plants, the soil or land surface may heat up more.
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Becoming smoother: A smoother surface typically allows for better absorption of heat, as rough surfaces can create turbulence and shade, reducing heat absorption.
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Becoming wetter: This often leads to increased heat absorption because water can retain heat.
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Removing snow: Snow has a high albedo (reflectivity) and helps reflect sunlight; hence removing snow would increase heat absorption.
Based on the analysis, the correct answers that increase heat absorption would be:
- Removing plants
- Removing snow
(Note: The question asks for two correct answers regarding factors that increase heat absorbed, while smoothing and wetting are relevant as well but do not match the context of direct choices. Ask if needed for clarification.)