EXPAND
A
Convert
B
Condense
C
Congest
D
Conclude
Correct Answer: Condense
Expand : Become larger or more extensive.Convert : Change the form,character,or function of something.
Condense : Make denser or more concentrated.
Congest : To concentrate in a small or narrow space.
Conclude : Bring or come to an end.
Antonym of Expand is Condense.