Question

select the correct answer. why are floods in urban areas particularly dangerous? a. city buildings do not allow flood waters to recede. b. flood waters spread pollutants and diseases more rapidly. c. flood waters permanently damage crop soils. d. most cities are built in flood zones.

Explanation:

• Option A: City buildings don't prevent flood waters from receding; water can still drain over time, so this is incorrect.
• Option B: Urban areas have more pollutants (e.g., from industries, sewage) and dense populations. Flood waters can spread these pollutants and diseases (like water - borne diseases) more quickly due to the high concentration of people and infrastructure, making floods more dangerous.
• Option C: Urban areas are not mainly for crop cultivation, so damage to crop soils is not a primary reason for urban flood danger.
• Option D: Most cities are not built in flood zones; they are often built near water sources but not necessarily in flood - prone areas, so this is incorrect.

Answer:

B. Flood waters spread pollutants and diseases more rapidly