Respuesta :
There is no gerund. A gerund is a form that is derived from a verb but that functions as a noun, in English ending in -ing, e.g., helping in do you mind me helping you?.
Answer:
The infinitive is to keep peace in the family and it functions as a predicate noun
Explanation:
An infinitive is a verb that is used in its base form after the preposition "to" (eg. to run, to play, to eat) infinitives have several functions and uses, this sentence has an infinitive for purpose, and in the syntaxis, it covers the function of a predicate noun which always follows a verb and makes reference to the subject of the sentence