A glacier retreats leaving bare rocks. Lichens begin to live on the rocks the lichens produce an acid that starts to break down the rocks how will this process affect the environment

layer 3 is younger than layer 6.

well, since there is no answer choices, i will give an answer on how it works : )

the two objects are placed together. energy will always be transferred from the hotter object to the cooler object until they are equal. hope this is close to one of the answer choices : )