Reading — Summary completion

photophores are light-producing organs in deep-sea fish. The passage describes light-producing organs called "photophores" in which some fish cultivate luminous bacteria, so photophores is the accepted answer.

The passage repeatedly frames critical thinking as a collection of "habits" that can be developed through practice, so habits is the accepted answer.

Photophores are the specialized organs in which deep-sea fish cultivate luminous bacteria to produce light. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.

• !Other options may refer to different biological structures, but photophores are the correct term for light-producing organs in deep-sea fish.
• !Some might think the debate was related to the coffee itself, but the passage clearly indicates it was about political discussions.

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