Question

Dangers to landform. who will give true answer will be marked as brainliest​

Answer 1

Answer:

The surface is the interface between the Sun-powered processes dominated by erosion and deposition and the tectonic processes driven by the Earth's internal energy. Most of the surface lies at two general levels: nearly 60 percent is between 1 and 5 km below sea level, and about 25 percent lies within a kilometer above or below sea level (Figure 5.1). The remaining 15 percent of the surface is concentrated in tectonically active mountain belts, continental slopes, and oceanic trenches.

The part of the surface most heavily populated is usually less than 1 km above sea level; most activities are concentrated in areas not far above sea level. Mountainous areas usually are sparsely populated because they are less favorable to agriculture, construction, and transportation and are more susceptible to hazards. Such areas tend to be used for specialized agricultural activities, mining, and recreation. In places where large populations concentrate in or close to structurally active mountainous regions—for example, those in Armenia, Chile, Nepal, and California—the residents are faced with special problems in developing the land resource because of the risk of seismic, volcanic, and landslide hazards.

Just at sea level—within the zone affected by tidal and storm-generated oscillations—spreads the biologically diverse region of environmentally sensitive terrains: marshes, swamps, tidal flats, and fens. Historically, such expanses were considered wastelands or were drained, filled, or surrounded by sea walls to increase their agricultural worth. Research conducted within the past 50 years has disclosed the inadvisability of such projects because they can disturb the natural breeding habitats of wildlife and the cleansing functions of the world's wetlands. Close study shows that wetlands constitute whole ecosystems supporting vast populations, not only of waterfowl, reptiles, and amphibians but also microscopic creatures. Coastal wetlands abound in unfamiliar fungal and bacterial species that perform the invaluable tasks of isolating and neutralizing the toxic compounds flushed through the system in the hydrologic cycle.