Question

the sky darkened around noon, and by the afternoon, rain began to pour relentlessly. as the hours passed, the streets slowly filled with water, turning roads into rivers. cars inched forward in traffic, unable to move quickly because of the rising water. public buses, too, were delayed, their routes blocked by flooded intersections. with the rain showing no signs of letting up, commuters scrambled to find alternate ways home, knowing that the storm had changed their usual routines completely. what was meant to be an ordinary day quickly turned into a frustrating series of delays and obstacles. what was an effect of the heavy rain? usual routes flooded intersections speeding cars

Explanation:

The text states public - buses' routes were blocked by flooded intersections due to heavy rain. Also, cars in traffic couldn't move quickly because of rising water from the rain - induced flooding. So, flooded intersections are an effect of the heavy rain.

Answer:

B. flooded intersections