Sam is my brother. __________ is a firefighter.

  1. She
  2. He
  3. It


Pronouns take place of nouns. This is done because sometimes, we don’t want to repeat the noun again and again. Personal pronouns like ‘he’, ‘she’, ‘they’ are used to replace names of persons. ‘it’ is used to replace things. ‘He’, ‘she’, ‘it’ are used to take place of one person or thing in the subject of the sentence.

The correct answer is: He

    The correct answer is 'he'.
    Sam is my brother. He is a firefighter.
    Sam is a boy, who is the subject of the sentence. Therefore, in the second sentence given above, Sam is replaced by the pronoun 'he'.