Which word is a gender-neutral singular pronoun?

they
she
it
he

they

The word "they" is a gender-neutral singular pronoun.

The gender-neutral singular pronoun is "they".

To arrive at the answer, you can consider the pronouns provided and determine which one does not specifically refer to a gender.

- "She" is a pronoun used for females, so it does not fit the criteria of being gender-neutral.
- "He" is a pronoun used for males, so it also does not meet the criteria of being gender-neutral.
- "It" is a pronoun typically used when referring to objects and animals, but not usually used for people. Therefore, it is not a gender-neutral pronoun when talking about people.

By a process of elimination, "they" is the pronoun that is commonly used as a gender-neutral singular pronoun, referring to individuals without specifying their gender.