Answer:
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. Mosses can then colonize the thin soil; as mosses die, the soil thickens more allowing other hardy species to colonize
Explanation:
The purpose<span> of a </span>salt bridge<span> is not to move electrons from the electrolyte, rather it's to maintain charge balance because the electrons are moving from one-half </span>cell<span> to the other. The electrons flow from the anode to the cathode.</span>
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