Answer:
B. The materials used in building cities retain heat
Step-by-step explanation:
The metropolitan region where the heat island effect is most pronounced is much warmer than the surrounding, natural, rural lands. The materials used in building, along with energy emissions from industry and transportation (cars), are to blame for the effect. For instance, because asphalt is impermeable, heat is reflected back into the air rather of being transferred to the ground like it does by flora and trees. Typically, heat islands are 2 to 6 degrees F warmer. Urban areas stay warm in the nights while the nearby rural regions drop down; the difference can be as high as 20 degrees F.
Communities may experience a rise in heat-related sickness and death, air pollution, air conditioning expenses, and water quality during the summer months due to heat islands.