How do lichens prepare bare rock to support the growth of plants?

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Explanation:

Lichens are often the first organism to colonize a new surface such as bare rock.

Many organisms require soil before they can colonize an area. Lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. Also, as lichens die, they provide some organic matter that also contributes to soil.

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because the light is a great source of energy for the plants to survive. (i hope this )