Final answer:
The author argues for the hosting of community gardens at schools principally because it provides important access to fresh fruits and vegetables, contributing significantly to the community's nutritional needs and overall health.
Step-by-step explanation:
One reason that the author uses to support the argument that schools should host community gardens is the importance of access to fresh fruits and vegetables. Hosting community gardens at schools would provide communities, especially in urban areas, with access to fresh produce, enabling people to make healthier food choices. This access is crucial as it contributes to nutritional needs and the overall health of community members. Additionally, being involved in a community garden allows individuals to gain a deeper understanding of the local environment, thereby empowering them to make informed decisions about their eighborhoods.