Step 1: Understanding the Sentence Structure
The sentence structure requires a passive form because the subject ("Health") is being acted upon by someone or something else. The phrase "to be" indicates a passive construction.
Step 2: Evaluating the Options
Option 1 ("neglect"): This is the base form of the verb and cannot be used after "to be" in this sentence.
Option 2 ("neglecting"): This is the present participle, but it does not fit the passive voice construction.
Option 3 ("neglected"): This is the past participle form of the verb, which is appropriate for the passive construction in this context.
Option 4 ("neglected"): This is correct as it completes the passive structure of the sentence.
Step 3: Conclusion
The correct answer is (4) neglected, as it completes the passive construction properly.