https://tts.langeek.co/read?text=d2hv&hash=7bd7b52be6f5b33c1e58b12ecf787f7eb54b420f&lang=en&cache-only=0&driver=googletts

which

https://tts.langeek.co/read?text=d2hpY2g&hash=bb3a6ac97a521a8a1271eee702bdd6aa1b43eada&lang=en&cache-only=0&driver=googletts

that

https://tts.langeek.co/read?text=dGhhdA&hash=8c59a4fd2662d6b159265b69df459edb8671aff0&lang=en&cache-only=0&driver=googletts

whom

https://tts.langeek.co/read?text=d2hvbQ&hash=a46ad7b9d0d80a4c47373f19b8b75022abb0ecab&lang=en&cache-only=0&driver=googletts

whose

https://tts.langeek.co/read?text=d2hvc2U&hash=2d502ac45f0fef1a3e07da29e096efb996d85cbd&lang=en&cache-only=0&driver=googletts

Relative pronouns are words that introduce relative clauses which provide additional information about a noun or noun phrase mentioned earlier in the sentence.

Relative Pronouns

English "Relative" Pronouns