Explanation:

- The sentence discusses India's labor-intensive sectors and the rate of its export growth.

- "Dizzying rate" implies a rapid and impressive growth.

- Let's look at the options:

1. week: This seems like a typo for "weak," which refers to low strength. Not suitable for describing rapid growth.

2. tepid: Means lukewarm or lacking enthusiasm. Also doesn't fit the context of "dizzying rate."

3. lukewarm: Indicates mild or not very intense growth. Not appropriate for high growth rates.

4. alarming: Means something happening rapidly or unexpectedly, possibly suggesting concern. ?? Correct Answer

5. stagnate: Implies no growth, which contrasts with the "dizzying rate" described.

The original word "dizzying" effectively conveys rapid export growth. "Alarming" is fitting because rapid growth could be unexpected or concerning.