With every step, the hiker's boots crunched through fallen leaves.
Meaning: As the person walked, the leaves that had fallen from the trees made a crackling sound under their shoes.
Choice of Words: Hiker is a person who goes on long walks, especially in the countryside. Boots are sturdy shoes worn for walking or hiking. Crunched means to make a crackling sound when stepped on, and fallen leaves are leaves that have fallen from trees.
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