Question

Assertion (A): Closely related species of warbler birds co-exist on the same tree. Reason (R): The behavioral differences in their foraging activities exhibit competitive release.

• A. Both (A) and (R) are true. (R) is the correct explanation for (A)
• B. Both (A) and (R) are true. (R) is not the correct explanation for (A)
• C. (A) is true. But (R) is false
• D. (A) is false. But (R) is true

Hint:

Resource partitioning = sharing resources; Competitive release = expanding niche after competitor is gone.

Answer 1

The Correct Option is C

Step 1: Read both lines.
The Assertion says related warbler birds live together on the same tree. The Reason explains this using the term competitive release. We must test each part.

Step 2: Recall the warbler study.
MacArthur studied five warbler species feeding on the same tree. He found they could coexist because each fed in a different zone of the tree.

Step 3: Judge the Assertion.
Since the warblers really do share one tree by behaving differently while feeding, the Assertion is true.

Step 4: Understand the correct term.
When species divide a resource to avoid clashing, the proper name is resource partitioning. This is what the warblers do.

Step 5: Judge the Reason.
The Reason calls it competitive release. But competitive release means a species spreads into a wider niche when a rival is removed. That is a different idea, so the Reason is false.

Step 6: Pick the option.
The Assertion is true but the Reason is false, which is the third option.
\[ \boxed{\text{(A) is true. But (R) is false}} \]