The correct answer is - b. False.
Mudflows occur on steep terrain, not on flat land where the swamps are found. Mudflows (mud flows, mudslides) represent a very fast moving flow of debris that has become fully or partially liquified because of the addition of huge amounts of water on the source material. So we have a situation were water and ground are mixed and become as one and they rapidly travel downhill in the form of very thick mud river, causing lots of damage on its path.
