Answer:
The correct answer is ocean and rocks.
Step-by-step explanation:
In a beach ecosystem, the rocks and oceans may restrict the growth of organisms. This is due to the activity of ocean tides that may result in the organisms inhabiting the rocks and other regions to flow away. The ocean and rocks in combination may result in the formation of conditions in which various organisms cannot develop. Due to ocean currents, the rocks may sometimes move away, this signifies that the organisms living in the rocks may move away to another place where their survival may become impossible.