Explanation:
As a tsunami leaves the deep water of the open ocean and travels into the shallower water near the coast, it transforms and travels at a speed that is related to the water depth and hence as the water depth decreases, the tsunami slows down. As a tsunami approaches shore or land it begins to slow and grow in height.In the coastal areas, a tsunami may appear as huge wall of water coming towards the coast. With its tremendous energy, the fast moving waves can crush houses and other structures in the coastal areas. Most of the deaths caused by a tsunami are due to drowning.
Gravity causes mass movement. Types of mass movement: landslides, mudslides, slump, and creep. The most destructive kind of mass movement is a landslide, which occurs when rock and soil slide quickly down a steep slope.
A country's motivation for a single-party government is most likely the want to keep the power within a certain group of people and to suppress political rivals from rising up and taking power from them. More often the current party is disliked to a certain extent and people would vote for another given the option.