Correct Answer:
B. Karachi
Correct answer: Karachi. Karachi, with its concrete buildings, roads, and little greenery, traps heat and forms an urban heat island.
Background: An urban heat island is a city that is warmer than the surrounding countryside.
- Gawadar: Gwadar is a small coastal town.
- Hyderabad: Hyderabad is smaller and less dense than Karachi.
- Thatta: Thatta is a small town with less concrete.
Did you know? In June 2015 a deadly heatwave hit Karachi.
Memory trick: Concrete city → Karachi heat.