English Language · English
Which choice best describes the overall structure of the text? Using NASA's powerful James Webb Space Telescope (JWST), Mercedes López-Morales and colleagues measured the wavelengths of light traveling through the atmosphere of WASP-39b, an exoplanet, or planet outside our solar system. Different molecules absorb different wavelengths of light, and the wavelength measurements showed the presence of carbon dioxide (CO2) in WASP-39b's atmosphere. This finding not only offers the first decisive evidence of CO2 in the atmosphere of an exoplanet but also illustrates the potential for future scientific breakthroughs held by the JWST.
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- 1It examines how a group of scientists reached a conclusion, then shows how other scientists have challenged that conclusion.
- 2It outlines the steps taken in a scientific study, then presents a hypothesis based on that study.
- 3It describes how researchers made a scientific discovery, then explains the importance of that discovery.✓
- 4It discusses a method used by some researchers, then states why an alternative method is superior to it.
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It describes how researchers made a scientific discovery, then explains the importance of that discovery.
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