Impact of Community Gardens on Urban Biodiversity

Read the following passage taken from a fictional article about community gardens:

Many urban areas have started promoting community gardens as a way to enhance biodiversity and engage residents. These gardens not only provide fresh produce but also serve as a gathering space where neighbors can connect. Moreover, they often attract various species of pollinators and other wildlife, contributing to the ecological health of the city. Additionally, community gardens can help combat urban heat by providing shaded areas.

Based on this passage, what is the primary relationship between community gardens and urban biodiversity?