Answer: a. True
Step-by-step explanation:
Both regional and flash floods are a result of the release of large quantities of precipitation and/or snow-melt.
Winter and spring rains combined with melting snow overfill river basins and flood the banks, triggering regional floods. Regional floods can also happen when there's lots of rain, which saturates the soil and allows runoff to flood into streams and rivers. A flash flood, also triggered by heavy rains, is a local flood, meaning that it occurs in a small geographical region.