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

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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They turn it into soil

i think that the best answer would be c.

tell me if im wrong : )

your spelling is a little off : ]