Urban greening aims to preserve which of the following?

Urban greening primarily focuses on preserving open spaces such as parks and gardens. These areas are vital for promoting biodiversity, enhancing community well-being, and improving air quality. Urban greening initiatives often aim to increase green spaces in cities to combat the effects of urbanization, such as the heat island effect, loss of natural habitats, and reduced recreational areas for residents. By prioritizing parks and gardens, urban greening supports both environmental sustainability and public health, providing a much-needed respite from the built environment.

The other choices do not directly align with the objectives of urban greening. High-rise buildings and commercial centers, while important for urban development, can contribute to overcrowding and environmental degradation if not balanced with green spaces. Industrial areas primarily focus on business activities, which often do not prioritize the inclusion of green areas. Residential districts may benefit from greening to improve living conditions, but the primary aim of urban greening is to enhance and preserve open spaces for the broader community.