Answer:
Gregor has lost the ability to speak.
Step-by-step explanation:
When Gregor becomes a giant insect, he experiences many changes. One of the things that Gregor has to deal with is the fact that he has lost the ability to speak, and therefore, cannot communicate with his family. This causes him great distress. Gregor also experiences other changes, such as a change in the foods he likes and dislikes and the transformation of his senses and abilities.