Leaves become compost.

Meaning: This means that the leaves will eventually rot and turn into a nutrient-rich substance that can be used to help plants grow.

Choice of Words: Leaves are the flat, usually green parts of a plant or tree that grow from the branches. Become means to change into something, and compost is a mixture of decayed organic material that is used as a fertilizer for plants. In this sentence, we are describing the natural process of leaves decomposing and becoming compost.

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Related Expressions