फुटबॉल के खेल में कितने रैफरी होते हैं और उनका क्या क्या कार्य होता है?
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There are two refries.one refrie look for one team that they are doing foul or not and another refrie look another team in same ways.
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Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
Image result for what is ecosystem
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An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. ... Ecosystems can be very large or very small.