Cat scratches tree to sharpen claws.

Meaning: This is a description of a cat scratching a tree to sharpen its claws. It is a common thing to see cats scratching trees. The cat is doing this because it wants to keep its claws sharp. The cat's claws are very important for it to hunt and climb trees.

Choice of Words: Scratch is a word that describes the action of making a mark or line on a surface with a sharp object. Tree is a tall plant with a thick stem and branches. Claw is a sharp, hooked nail on the foot of an animal, especially a cat. So the sentence means that the cat is scratching the tree with its claws in order to sharpen them.

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