Final answer:
Delhi has some of the worst air pollution in the world, which is a true statement. Contributing factors include heavy traffic, industrial activity, and the burning of coal for electricity.
Step-by-step explanation:
Delhi is known for having some of the worst air pollution in the world; therefore, the correct answer to the student question is a. true. India's capital faces severe air quality challenges due to factors such as burning coal for electricity, a significant increase in the number of vehicles with insufficient emission controls, deforestation, and the consequences of industrial activities. Traffic congestion also contributes massively to the air pollution, as idling vehicles in slow-moving traffic emit more pollutants compared to free-flowing traffic. This poor air quality has a direct impact on health, leading to respiratory and circulatory system problems and making indoor air pollution an additional concern, particularly in developing nations where solid fuels are used for cooking and heating.