Answer:
A lot of advice is available for people who want to form new habits for themselves.
Explanation:
Since the antecedent is plural, then the pronoun must be plural. People wishing to form new habits ought to be given a series of advice on how to go about it.
Answer:
It is the action in the sentence. A verb tells us that some act has been carried out by the subject.
The Vietnam war was broadcasted on live TV