The two correct benefits of alley cropping in the rainforest are:
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Maintenance of soil's nutrients - Alley cropping can help maintain soil health by providing shade and organic matter, which can improve nutrient retention and reduce erosion.
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Increased biodiversity - Alley cropping can enhance habitat diversity and promote a variety of plant and animal species by integrating different crops and trees in the landscape.
So the answers are maintenance of soil's nutrients and increased biodiversity.