Answer:
B. water conservation
Step-by-step explanation:
Every city is characterized by crowding, in large cities the concentration of people generates various debris or dirt caused by social relations (industrial, commercial, cultural and residential).
The problem of urban pollution has occurred since the nineteenth century, in England at the beginning of the industrial revolution, today, after the world has gone through three industrial revolutions and population growth, it has a population of about 6 billion people consuming and generating waste and pollution.
Waste is one of the main problems in large urban centers, especially in developed countries, one example is the US that produces about 10 billion tons of solid waste per year, one of the main polluting agents are disposable packaging. One way to reduce the amount of waste is by applying measures to mitigate and reduce consumption by reusing and recycling products.