Final answer:
The correct term for the redevelopment of under-developed or undeveloped parcels within an existing community is Infill development. It is often part of broader urban renewal efforts, which can be controversial due to the displacement of residents and the use of eminent domain.
Step-by-step explanation:
The term for development or redevelopment of under-developed or undeveloped parcels within an existing community is Infill development (A). This concept is commonly associated with urban renewal, which are civic efforts aimed at revitalizing and redeveloping urban areas with construction projects.
New Urbanism represents a more recent approach to urban development, placing emphasis on the construction of urban spaces that combine residential, business, and leisure amenities. It often promotes transit-oriented development and can enhance a region's infrastructure, economy, and community fabric.