Question

how do lichens alter the abiotic environment to favor the establishment of other species of plants? they break down rock and form soil. they reflect sunlight to help them to grow. they provide energy for other plants. they are a good food source for pollinators. they do not help other plants to grow at all.

Explanation:

Lichens are pioneer species in primary succession. They secrete acids that break down rocks, starting the process of soil - formation which is essential for the establishment of other plant species.

Answer:

They break down rock and form soil.