Why can a small additional pressure cause a large change in a system near an environmental limit?
Answer and explanation
Correct answer: The system may be near a threshold
Many environmental systems do not respond proportionally at every stage. They may absorb pressure for some time, but near a threshold their regulating capacity becomes weak. A small additional disturbance can then trigger a rapid shift to another state, such as clear water becoming algae-dominated. This nonlinear threshold behaviour is why A is correct; the other options deny observed system complexity.
Frequently asked questions
What is the correct answer to this question?
The system may be near a threshold
Why is this the correct answer?
Many environmental systems do not respond proportionally at every stage. They may absorb pressure for some time, but near a threshold their regulating capacity becomes weak. A small additional disturbance can then trigger a rapid shift to another state, such as clear water becoming algae-dominated. This nonlinear threshold behaviour is why A is correct; the other options deny observed system complexity.
Which subject and chapter does this question cover?
This is a Class 11 Geography question. Chapter: Geography as a Discipline. Topic: Geography as an integrating discipline.
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