One who always runs away from danger

Answer: Option B

One word substitute is Timid.

Escapist: a person who seeks distraction and relief from unpleasant realities, especially in the form of entertainment or fantasy.
Timid: showing a lack of courage or confidence; easily frightened.
Brave: ready to face and endure danger or pain; showing courage.
Shirker: avoid or neglect (a duty or responsibility).