Question

A unit consisting of biotic and abiotic factors.​

Answer 1

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The ozone layer is the common term for the high concentration of ozone that is found in the stratosphere around 15–30km above the earth's surface. It covers the entire planet and protects life on earth by absorbing harmful ultraviolet-B (UV-B) radiation from the sun.

Answer 2

Eco system comprises of both biotic and abiotic factors
biotic factors include living forms whereas abiotic factor comprise of physical factors like air water wind humidity pressure etc