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