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The presence of living creatures is determined by environmental factors. Environmental factors can be distinguished as conditions and resources. The condition is a factor that magnitude can be measured and not run out if used by the organism. Examples of conditions are temperature, light intensity, rainfall, and solar radiation. Resources are environmental factors that can be discharged its availability if it is used, such as food and space (residence).
The sun is the main energy source for life on earth. The amount of sunlight received by the earth's surface to determine the spread of living things. Because the surface of the earth is round, every place on earth to get the amount of sunlight different. As a result, the temperature at various places on the earth's surface varies.
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