The most important erosion factors include the climatic, hydrological, topographic, soil, geological and vegetation conditions, as well as the economic and technical and the socioeconomic conditions of the human society.

Erosion is caused by the impact of raindrops on bare soil and by the power of running water on the soil surface. Natural erosion rates depend on inherent soil properties, slope, and climate, which together determine the ability of the site to support vegetation.

This range in rates is dependent on several different controlling factors. These factors include the type and amount of plant cover and animal activity, the climate, the nature of surface materials, the slope angle, and human land use.

Explanation: Erosion can occur naturally by wind, water, and gravity.

The changes which take place in a long period of time are called slow changes whereas that changes which take place in a short period of time are called fast changes. Examples: (a) Rusting of iron, formation of day and night, ripening of fruits, growing of trees are slow changes.

Natural changes are the effects that happen majorly because there is no control over living creatures due to natural factors. A few of the examples of changes in nature are. It completely depends on nature and human beings have no influence over it. Hurricanes – An other example of natural changes is hurricanes.

Examples of natural changes are growth in man and seasonal changes and examples of man-made changes are burning of fuels and chemical reactions.

Wind, rain, predation and earthquakes are all examples of natural processes which impact an ecosystem. Humans also affect ecosystems by reducing habitat, over-hunting, broadcasting pesticides or fertilizers, and other influences. The line between natural and human caused effects often blurs.

Answer:

• Organisms live there.
• Nature.
• Disasters.
• Water.