Final answer:
The correct verb form for the sentence is 'visit,' since 'family' is treated as a plural entity when its members are considered individually. The completed sentence is 'His family visit him frequently now that he lives near the beach.'
Step-by-step explanation:
The correct verb form for the sentence "His family_ him frequently now that he lives near the beach." is "visit." The subject 'family' in this context is treated as a plural entity because it refers to a collective group of individuals, even though the family is a single unit. Therefore, the plural verb form 'visit' should be used. The complete sentence should read: "His family visit him frequently now that he lives near the beach."
When deciding the correct verb form, one must ensure that the verb agrees with its subject in both number and tense. In sentences where the subject is a collective noun such as 'family,' 'team,' or 'committee,' the context determines whether the noun is treated as singular or plural. In this case, the family is doing something as individual members of the group (visiting him), which means we use the plural verb form.