Identify three ways boundaries are created and provide a specific example of each one.

Physical boundary are those like mountain, rivers and the desert.

Explanation:

There are numerous physical boundaries in the world like those of the terrestrial and the atmospheric and the hydrological boundaries. The physical boundaries on land are created by the mountains, plains and the plateaus, islands and the valleys all are physical forms and are distinct from each other by the erosion and deposition processes that create them and these processes are called as the agents of weathering. Whereas the boundaries that are created due to the presence of the various temperature layer and these layers represent distinct boundaries of aquatic zones like the photic, littoral and the deep abyssal zones.

Ba rock that formed 1,400 million years ago!