Question

The gradient of a stream will ______, and so will its erosion rates, if subsidence occurs at the ______.

Multiple choice question.
a) decrease; mouth
b) increase; headwaters
c) decrease; headwaters

Answer 1

The gradient of a stream will decrease, and so will its erosion rates, if subsidence occurs at the headwaters.

Step-by-step explanation:

The gradient of a stream will decrease, and so will its erosion rates, if subsidence occurs at the headwaters.

Answer 2

The gradient of a stream will decrease, and so will its erosion rates, if subsidence occurs at the mouth.option is correct.

Step-by-step explanation:

When subsidence occurs at the mouth of a stream, it results in a lowering of the land surface in that region. This lowering of the land surface reduces the gradient of the stream as it flows towards its mouth.

The gradient of a stream is the slope or steepness of the stream channel, and it plays a crucial role in determining the stream's erosional capabilities. A decrease in gradient leads to a reduction in the stream's erosive power, as it has less energy to transport sediment and erode the landscape.

Option A is correct.