Question 13

Insert the sentence immediately before sentence 8

The sentence 'Scientists have different explanations for these results:' should be inserted immediately before sentence 8, as it introduces the discussion about the differing viewpoints regarding the causes of climate change.

A) Immediately before sentence 1

Inserting the sentence before sentence 1 would disrupt the introduction of the main topic regarding global warming and its causes. The context at this point requires a focus on the scientific agreement about climate change, rather than introducing differing explanations.

B) Immediately before sentence 4

Placing the sentence before sentence 4 would be inappropriate as it would interrupt the flow of information about Milankovitch cycles without adequately establishing that differing explanations are being considered. The passage at this point is focused on the scientific understanding of historical climate changes.

C) Immediately before sentence 8

This placement is appropriate because it precedes the discussion about the anthropogenic climate change model and the Milankovitch theory. The sentence effectively sets the stage for contrasting explanations that follow, highlighting the scientific debate over the causes of current climate change.

D) Immediately before sentence 11

Inserting the sentence before sentence 11 would not fit well because the preceding sentences are already concluding the discussion on the anthropogenic model and Milankovitch theory. This placement would confuse the reader by introducing a new concept at the end of the argument rather than at a point where the debate is being established.

Conclusion

The correct placement of the sentence is immediately before sentence 8, as it introduces the contrasting viewpoints that are essential for understanding the subsequent discussion. Other options either disrupt the flow of the argument or are ill-timed for the context, failing to appropriately set up the scientific debate being presented in the passage.