Question

using nasas 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 - 39bs 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. which choice best describes the overall structure of the text? a. it discusses a method used by some researchers, then states why an alternative method is superior to it. b. it describes how researchers made a scientific discovery, then explains the importance of that discovery. c. it outlines the steps taken in a scientific study, then presents a hypothesis based on that study. d. it examines how a group of scientists reached a conclusion, then shows how other scientists have challenged that conclusion.

Explanation:

The text first describes how researchers used the JWST to measure light - wavelengths and find CO₂ in an exoplanet's atmosphere (scientific discovery). Then it explains the importance of this discovery as the first evidence of CO₂ in an exoplanet's atmosphere and the potential of the JWST for future breakthroughs.

Answer:

B. It describes how researchers made a scientific discovery, then explains the importance of that discovery.