Gold is used in instruments to enable astronauts to travel into space. Which purpose does this illustrate?

• A. To enable astronauts to travel into space
• B. To power rockets
• C. To heat spacecraft
• D. To measure radiation

Answer: (A)

The main idea here is function in service of a goal. Using gold in instruments shows it’s chosen for its qualities that keep those instruments reliable and effective in the space environment. In space, instruments must survive extreme conditions and radiation while giving accurate readings; gold helps them do that, which directly supports the mission of traveling into space. So the purpose illustrated is enabling astronauts to travel by ensuring the instruments work properly in space.