Rearrange the following sentences and answer the given questions.

A. This accelerated warming, known as Arctic amplification, has drawn significant concern among climate experts.

B. Studies further reveal that if current trends continue, the Arctic could experience ice-free summers within this century.

C. Scientists attribute this rapid ice loss to global climate change, which has intensified over the past few decades.

D. The Arctic region is witnessing an alarming rate of glacier melting due to rising global temperatures.

E. The melting of these glaciers not only raises sea levels but also disrupts marine ecosystems and weather patterns worldwide.

F. Some recent research highlights that the Arctic is warming at least twice as fast as the global average.

G. Therefore, global efforts to reduce greenhouse gas emissions are critical to slow down these changes and protect fragile ecosystems.

Which of the following is the FOURTH sentence after rearrangement?

To determine the fourth sentence after rearrangement, let us analyze the logical sequence of the given sentences step-by-step:

1. Sentence D: "The Arctic region is witnessing an alarming rate of glacier melting due to rising global temperatures."
This serves as the ideal introductory sentence as it introduces the main topic: glacier melting in the Arctic region.

2. Sentence C: "Scientists attribute this rapid ice loss to global climate change, which has intensified over the past few decades."
This sentence logically follows D by explaining the cause behind "this rapid ice loss" (referring back to the glacier melting in D).

3. Sentence F: "Some recent research highlights that the Arctic is warming at least twice as fast as the global average."
This introduces specific research highlighting the intensity of warming in the Arctic.

4. Sentence A: "This accelerated warming, known as Arctic amplification, has drawn significant concern among climate experts."
Sentence A directly refers to "This accelerated warming" mentioned in sentence F (warming twice as fast as the global average) and defines it as "Arctic amplification". Thus, A is the fourth sentence.

5. Sentence B: "Studies further reveal that if current trends continue, the Arctic could experience ice-free summers within this century."
Sentence B builds upon the concerns of experts with further study predictions.

6. Sentence E: "The melting of these glaciers not only raises sea levels but also disrupts marine ecosystems and weather patterns worldwide."
Sentence E details the broader consequences of the melting glaciers.

7. Sentence G: "Therefore, global efforts to reduce greenhouse gas emissions are critical to slow down these changes and protect fragile ecosystems."
Sentence G provides a concluding statement summarizing the necessary action based on all the facts presented.

The correct paragraph order is D - C - F - A - B - E - G.

The fourth sentence in the coherent paragraph is A.

Therefore, the correct option is A (Option 4 in the provided options list).