Question

places that get heavy rain or snow have houses with sloping roofs. why

Answer 1

this type of places have sloping roofs by which
heavy rains don't stay some places are meghalaya.
hope it will help you my dear friend plz mark it as brainliest I need it.

Answer 2

For the most part, houses in such regions are based on elevated foundations. Bringing the foundations up in wet/flooding climatic zones is perfect as it likewise finds cooling breezes under the house. Wet sealing or dry-sealing opposes water damage.  

Another strategy for building houses in territories of heavy rainfall is utilizing steeply slanting rooftops. The steeply inclining rooftop will enable the water to keep running off and maintain a strategic distance from it gathering on the rooftop, adding undesirable weight to the rooftop, and harming the common setting of the concrete/RCC.