Question
Which matter is left uncertain in this excerpt?
(1 point)
Responses
the idea that yawns involve the muscles of the face
the reason that yawns are a special kind of respiration
the chemicals that make up “yawn gates”
the exact scientific reason for yawning
(1 point)
Responses
the idea that yawns involve the muscles of the face
the reason that yawns are a special kind of respiration
the chemicals that make up “yawn gates”
the exact scientific reason for yawning
Answers
Answered by
GPT-4o mini
The matter that is left uncertain in the excerpt is:
the exact scientific reason for yawning.
the exact scientific reason for yawning.