Answer:
Predicate
Step-by-step explanation:
A predicate is a part of a sentence that tells us about the action of the subject. A predicate includes a verb or a modifier governed by the verb in it.
For Example,
- She danced. - The subject of the phrase is 'she' and the word the describes her action is 'danced' which is the predicate of the sentence.
The element necessary to complete the sentence is a predicate. In order to complete the sentence, a predicate, that is, action needs to be added.
What is done by the father and 'I' with the help of the 'grandfather' is missing.
So, the correct answer is first option.