Question

which event is a consequence of urban heat islands?
increased winds within the city
increased precipitation downwind of the city
decreased winds within the city
increased precipitation upwind of the city

Explanation:

Urban heat islands warm city air, causing it to rise and draw in moist air from downwind areas. This rising moist air cools, condenses, and leads to increased precipitation downwind of the city. Urban structures also reduce wind speeds, but this is a direct effect, not a primary consequential event tied to the heat island's atmospheric dynamics. Upwind areas do not experience increased precipitation from the city's heat island effect, and winds are decreased, not increased, within the city.

Answer:

increased precipitation downwind of the city