Final answer:
Gerund phrases function as nouns and end in -ing in sentences provided.
Explanation:
Gerund phrases function as nouns and end in -ing. In the sentences provided, the underlined gerund phrases are:
- Getting regular exercise - in the sentence 'A healthy lifestyle requires getting regular exercise.'
- Having a healthy diet - in the sentence 'To live a long life, it's important to have a healthy diet.'
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