The correct answer is take shape.
B. add body
D. assume shape
The correct answer is (D) To assume or take shape; to become clear, substantial, or definite; to congeal, to become jellylike; to assume the consistency of a jelly.
Jell comes from jelly (English), which derives from Latin gelare (to freeze).
Examples of use:
- As the meeting progressed, their plans jelled.
- She stirred the pudding for several minutes before it began to jell.