Chemistry, 04.08.2019 10:30, isabella20142002

Science grade 8 does anyone know this answer to this science question? select the sentence that is true about how a person changes the pitch of sounds when singing. a person stretches the vocal cords to produce higher-frequency sound waves. a person stretches the vocal cords to produce lower-frequency sound waves. a person relaxes the vocal cords to produce higher-frequency sound waves. a person relaxes the vocal cords to produce lower-frequency sound waves.

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Science grade 8 does anyone know this answer to this science question? select the sentence that is...