Correct Answer: A. G. Tansley
Subject: 2025
Explanation: <b>Key Fact</b><br>A. G. Tansley coined the term ecosystem.<br><br><b>Additional Info</b><br>Topic: Ecology. The correct option is <b>B</b> — A. G. Tansley.<br><br><b>Why the other options are wrong</b><br><b>Option A</b>: A. P. Shelford — not the option marked correct for this question.<br><b>Option C</b>: Haeckel — not the option marked correct for this question.<br><b>Option D</b>: E. P. Odum — not the option marked correct for this question.<br><br><b>Exam Trick</b><br>Identify the exact concept tested, then eliminate options that contradict the definition, formula, chronology or fact in the question.<br><br><b>Final Answer</b><br>Option B — A. G. Tansley.