Answer:
3. It is not an easy thing to eat once a day.
Explanation:
The third sentence is the phrase in the sentence because it does not contain both a subject and a verb simultaneously. There is a verb there notably which is, eat, but there is no accompanying subject. A phrase is a group of words that do not contain a subject and a verb.
There are various types of phrases and these include; the verb phrase, adjectival phrase, noun phrase, adverbial phrase, etc. The third sentence is simply an observation or statement without reference to a subject.
