Final answer:
Shade-grown coffee is more sustainable than sun-grown coffee because it supports ecosystem biodiversity by providing habitats for forest birds, helping to control pests naturally, preventing soil erosion, and preserving water resources.
Step-by-step explanation:
The question is why shade-grown coffee is more sustainable than coffee grown in full sun. Among the options provided, the answer is B: It provides habitat for forest birds. Shade-grown coffee plantations use agroforestry practices that integrate coffee trees with other types of forestation, promoting ecosystem biodiversity. Such plantations provide habitat for forest birds and other wildlife, which is crucial given that many traditional coffee plantations contribute to deforestation and habitat loss. Additionally, these shaded areas can help control pests naturally through predation by resident birds and reduce the need for chemical pesticides, which has environmental and health benefits. Also, by preventing soil erosion and preserving water resources, shade-grown coffee supports a more sustainable agriculture system.