The answer is autotrophs Hope this helps :)
Answer:
rift valleys and new crust but there might be more
The correct answer is age of the rock layers
The defining characteristic of the intertidal zone is that it is submerged with water during high tide and exposed to the air during low tide. The zone can take many forms, from sandy beaches to rocky cliffs. It is common for the intertidal zone to change frequently, since it is constantly battered by crashing waves.
Hope this helped.