The removal of land when a stream suddenly changes its channel is

Correct Answer

C) avulsion.

Avulsion is defined as the sudden removal or addition of land by the action of water — such as when a river abruptly changes its channel during a flood — and this is precisely what the question describes. The correct answer is C (avulsion), and the question's own explanation confirms this: avulsion is the sudden loss or addition of land due to natural forces. Under California water and property law, as well as common law principles adopted nationwide, avulsion is distinguished from accretion by its sudden, dramatic nature rather than gradual accumulation.