All of the sentences you provided contain both a noun phrase and a verb phrase. Here’s the breakdown:
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"Some dog breeds have docked tails."
- Noun phrase: "Some dog breeds"
- Verb phrase: "have docked tails"
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"You can find frogs and insects by the pond if you look closely enough."
- Noun phrase: "frogs and insects"
- Verb phrase: "can find"
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"The pigeons have not landed on my neighbor’s balcony in a long time."
- Noun phrase: "The pigeons"
- Verb phrase: "have not landed"
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"He sat on my grandmother’s favorite armchair."
- Noun phrase: "my grandmother’s favorite armchair"
- Verb phrase: "He sat"
So, all sentences include both noun and verb phrases. If you were to select one, any of the sentences would be correct.