Final answer:
The depth to which streams can erode a particular landscape is limited by the hardness of rocks.
Step-by-step explanation:
The depth to which streams can erode a particular landscape is limited by the hardness of rocks. When streams flow over softer rocks, they can erode the landscape more easily and reach greater depths. However, when they encounter harder rocks, they are unable to erode as deeply. This is because hard rocks are more resistant to erosion and do not easily wear away.
For example, in mountainous areas, river valleys have been carved out by the action of water over millions of years, but the depth of erosion is limited by the hardness of the rocks present.
Therefore, the correct answer to the question is c) Yes, limited by the hardness of rocks.