why is alley cropping considered a sustainable farming practice?

a)it requires farmers to know best practices for only one crop.

b)it allows farmers to meet current needs while preserving resources.

c)it is less expensive than conventional farming.

d)it allows farmers to focus on selling their crops locally.

Alley cropping considered a sustainable farming practice because it allows farmers to meet current needs while preserving resources. Therefore, the correct answer to the question is option b.

Explanation:

Alley Cropping is defined as the type of cropping in which the long trees are planted at the boundaries having maximum distance between them and the small shrubs and herbs are planted in between the space between them.

This type of farming is very essential and beneficial for the farmer and the environment. It is so because it utilizes all the land for farming purpose and at the same time it allows the farmer to meet his all the needs of the current situation and also saves much input for the future use.  

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the answer is "a.) well–developed vascular system."

explanation: