Contrasting I believe sorry if I’m wrong
choice 2 and 4 are the best, hope this helps
(3) Fire, in fact, has been a significant factor in human development and progress in many ways.
This is the main idea. The rest of the sentences support the idea that fire has helped human development and progress. It says that it has allowed humans to "travel into regions that were previously too cold" and "to sleep securely". The passage then continues to talk about how when humans learned to control fire it made significant changes in how long people were able to be productive since they no longer had to rely on the sun for light.
Answer:
These ideas are too specific to be what the ENTIRE article is about. Instead, those details SUPPORT the central ideas of the text. and conclusion paragraph paragraphs often have a THESIS STATEMENT, which is a main idea sentence that shows what the entire passage is about (similar to your on-demand writings).
