4) Mosses establish themselves on rocky ground and slowly break the rocks down, making soil filled with minerals from broken-down rock that is suitable for more highly developed plants to be able to then establish themselves. This shows that .

Mosses are pioneer plants

Explanation:

Mosses are defined as small flowering plants that can grow in shady or dump location. They are forming mats or dense green clumps. These plants do not have vascular tissues so, they are known as none vascular plants.

They are known as pioneer plants because they have the ability to survive in barren and rough areas are where other plants cannot survive. They can obtain their food, or nutrients from the air, for survival they only require adequate moisture, shady places, and acidity.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.