Question

Moreover, human population will stabilize at about 11.5 billion. (make it less definite)​

Answer 1

Question :-- Moreover, human population will stabilize at about 11.5 billion. (make it less definite) .

Answer :-- Moreover, human population may stabilize at about 11.5 billion.

Explanation :-

→ Definite Means = this will happen..

→ Less definite Means = this could happen.

→ Not possible = this will not happen...

==>> As you can see, "May" is used to talk about something with a less definite aspect of possibility.. ( something that is possible but uncertain. )