Is the pronoun in sentence reflexive intensive both or neither Joan helped herself to more pie?

The pronoun in the sentence "Joan helped herself to more pie" is reflexive.

Here's why:

* Reflexive pronouns refer back to the subject of the sentence. In this case, "herself" refers back to "Joan".

* Intensive pronouns emphasize the subject. They are optional, and the sentence would still make sense without them.

Let's look at an example of an intensive pronoun:

* Joan herself baked the pie. (You could say "Joan baked the pie" and the meaning wouldn't change.)

The pronoun "herself" in the original sentence is necessary for the sentence to make sense. It's not optional, and it's referring back to the subject.