IELTS Reading Sentence Completion

Many cities are redesigning old drainage areas as wetland parks. Instead of moving rainwater away as quickly as possible through concrete channels, these parks hold water temporarily and allow it to filter through plants and soil. During heavy storms, this storage capacity can reduce pressure on underground pipes and lower the risk of street flooding. Wetland parks also create habitats for insects, birds and amphibians. A narrow strip of water beside a road may look small, but if it contains native plants and shallow pools, it can support species that struggle to survive in heavily paved districts. Some city planners therefore describe these parks as ecological infrastructure rather than simple decoration. The success of a wetland park depends on maintenance. Plants must be monitored, litter needs to be removed and water levels should be checked after extreme weather. If a park is neglected, blocked channels can reduce water flow and the area may become less effective during storms. Public access is another important issue. Walkways, signs and viewing platforms can help residents understand why the landscape sometimes appears wet or muddy. When people recognize the purpose of the park, they are more likely to support its long-term protection.