Birds build nests to keep eggs safe.
Meaning: Birds make nests to protect their eggs from harm.
Choice of Words: Birds refers to the group of warm-blooded, feathered animals that lay eggs. Build means to construct or create something. Nests are structures made by birds to hold their eggs. Keep means to hold or protect something. Eggs are the hard-shelled objects laid by birds that contain a developing baby bird. Safe means free from harm or danger.
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