Final answer:
The Chorus celebrates man as the 'apex' of all beasts, which signifies humanity's top position in the hierarchy of living beings.
Step-by-step explanation:
The Chorus in the play celebrates man as the apex of all beasts in the world. This term suggests that humans are at the top or the highest point in the hierarchy of living creatures, similar to the peak of a mountain. While other options like pinnacle, epitome, and zenith might also suggest high status or achievement, the apex is the most appropriate word when referring to the highest rank in a particular context, especially in a hierarchy of animals.