Which process becomes stronger when a river's base level suddenly falls?
Answer and explanation
Correct answer: Downcutting and rejuvenation.
Base level is the lowest level toward which a river can erode. If it falls suddenly, the river gains renewed potential energy and begins cutting downward into its bed and valley; this renewed vertical erosion is called rejuvenation. Option A is correct and may produce knickpoints, terraces, or incised meanders. Coastal deposition, glacial plucking, and karst-roof collapse require different agents and settings.
Frequently asked questions
What is the correct answer to this question?
Downcutting and rejuvenation.
Why is this the correct answer?
Base level is the lowest level toward which a river can erode. If it falls suddenly, the river gains renewed potential energy and begins cutting downward into its bed and valley; this renewed vertical erosion is called rejuvenation. Option A is correct and may produce knickpoints, terraces, or incised meanders. Coastal deposition, glacial plucking, and karst-roof collapse require different agents and settings.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting. Topic: accounting principles.
