Step 1: Sentence Analysis.
The sentence addresses the falling birth rates in developed countries. Segment (A), "The declining birth rate in developed," contains a grammatical error. The word "developed" requires a noun, such as "countries" or "nations," to follow it for grammatical correctness and clarity.
Step 2: Option Analysis.
- (A) 1. A: This segment contains the error. "Developed" needs a subsequent noun to define its context. This is the correct selection.- (B) 2. B: The word "nations" is used correctly here. No error is present.- (C) 3. C: This portion of the sentence is grammatically sound. No error exists.- (D) 4. no error: Segment (A) contains an error, invalidating this option.
Step 3: Conclusion.
Segment (A) is identified as containing the error. Therefore, option (A) 1. A is the correct answer.