The word "supple" means easily bendable, adaptable, or flexible.
Checking options:
- (a) Hard → opposite of supple.
- (b) Round → unrelated to the meaning.
- (c) Rigid → opposite of supple.
- (d) Flexible → correct synonym.
\[ \boxed{\text{Flexible}} \]
Find the missing code:
L1#1O2~2, J2#2Q3~3, _______, F4#4U5~5, D5#5W6~6
Find the missing number in the table.