Read the sentences.She told us the noise she’d heard was like fingernails on a chalkboard. She said it reminded her of the way shrieking cats and grinding metal sound.

The sentences describe a harsh, unpleasant noise that could make someone recoil or tremble. “Shuddering” means reacting with a sudden tremble, often because something is unpleasant or frightening. Sighing and exhaling are breathing actions, while laughing does not fit the reaction described.

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