Directions: Choose the appropriate word from the given options and fill in the blank. A frustrated person is a ---------------- threat to social order and harmony.

Potential threat means a threat that exists but has not yet fully manifested - frustrated people may disrupt society but haven't necessarily done so yet. Helpless and forsaken describe passive victims who can't threaten anything. Grave threat means the threat already exists and is serious, but the sentence suggests the threat is latent, not current.