Identify the highlighted gerund phrase that acts as a predicate nominative. An important part of a firefighter's job is rescuing people. Firefighters are often seen ascending ladders. The showering of water from the high-pressure hoses is impressive to see. After the fire is extinguished, salvaging property becomes the main focus of the firefighters.

A predicate nominative is also known as predicate noun wich complete the linking verb and renames the subject. It is a complement and they only complete linking verbs.

An example: Students' favorite food must be pizza.

food = subject, must be = verb, pizza = predicate nominative

The correct answer is number 1: An important part of a firefighter's job is rescuing people

fighterfighter's job = subject, is = verb, rescuing people = predicate nomitative