Question

why does the speaker say that freedom is fragile?
in three generations, north korea cannot read the book 1984 written by george orwell.
in three generations, only machines and animals can speak.
in three generations, human races may go extinct.
in three generations, people may no longer know the meaning of freedom.

Explanation:

The idea that freedom is fragile implies that over time, values like freedom can be lost or forgotten. If in three generations people may no longer know the meaning of freedom, it shows how easily the concept can fade away, highlighting its fragility. The other options about North - Korea reading a book, only machines and animals speaking, or human races going extinct are not directly related to the fragility of the concept of freedom.

Answer:

In three generations, people may no longer know the meaning of freedom.