A. Fast
B. Slow
C. Medium
D. Shy
✅ The correct answer is option D.
Fast : moving or capable of moving at high speed.
Fast : moving or capable of moving at high speed.
Slow : moving or operating, or designed to do so, only at a low speed
Medium : an agency or means of doing something.
Shy : nervous or timid in the company of other people.
Timid : showing a lack of courage or confidence.
Synonym of Timid is Shy