Read the sentence below: Biologists have created an immortal frog. They removed its vocal chords and now it cannot croak. Which of the following correctly explains the pun in this sentence and the word or words on which it is built?

Biologists—these scientists can both create and enjoy immortality, as their name implies Croak—croak is the sound a frog makes and an expression for dying Immortal—frogs are known to be immortal god-like creatures in some cultures Vocal—frogs are typically described as being quite vocal at night

Is it Croak??