Answer:
1. A pronoun takes the place of a noun.
2. The pronoun which replaces the noun must agree with it in these ways:
a) A subject pronoun must replace a subject noun.
An object pronoun must replace an object noun.
b) A feminine pronoun must replace a feminine noun.
A masculine pronoun must replace a masculine noun.
c) A singular pronoun must replace a singular noun.
A plural pronoun must replace a plural noun.
Explanation: