What type of pronoun is bolded in the following sentence The truck which sometimes stalls belongs to our neighbor?

The bolded pronoun in the sentence "The truck which sometimes stalls belongs to our neighbor" is a relative pronoun.

Here's why:

* Relative pronouns connect a dependent clause (the part that starts with "which") to a main clause (the part that starts with "The truck... belongs to our neighbor").

* "Which" is a relative pronoun used to refer back to the noun "truck" in the main clause.

Let me know if you'd like to know more about relative pronouns!