In Environmental Studies, the concept of perpetual resources is centered around their availability and usage. Let's analyze the options:
Based on the analysis, the correct main characteristic of perpetual resources is Continuous availability at a limited rate.
The main characteristic of perpetual resources is continuous availability at limited rate.
Additional Context:
Correct Answer: (2) continuous availability at limited rate.
| List-I (Author) | List-II List-II (Book/Poem) |
| (A) Gary Snyder | (I) Mountains and Rivers Without End |
| (B) Wendell Berry | (II) The Closing Circle |
| (C) Rachel Carson | (III) Silent Spring |
| (D) Barry Commoner | (IV) A Place on Earth |