It is a result of. Erosion
Answer:
Stars produce energy from nuclear reactions, primarily the fusion of hydrogen to form helium. These and other processes in stars have lead to the formation of all the other elements.
HYDROGEN
Explanation:
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<span>b. gravel on the bottom of the aquarium</span>
An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system. <span>
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Biotic factors:
Plants
Microorganisms
Macroorganisms
