Answer:Option A
Step-by-step explanation:
The construction of large mall and parking lot will pollute the atmosphere as well as the impacts the environment. The rest of the options have less impact on the environment.
The use of permeable pavement system is used to filter the water. It helps in cleaning the water and used in parking lots, parks et cetera.
The preservation of the green parks and rain barrels to collect water and use it afterwards is helpful for the environment.