Verification of truth — What danger always involves Danger always involves ________.

Introduction / Context:
“Danger” denotes exposure to harm. In aptitude keys, we often map abstract nouns to their inevitable psychological correlate present in human appraisal.

Concept / Approach:
Enemy/attack/hate are specific scenarios; fear is the general human response to perceived danger and thus the constant accompaniment.

Step-by-Step Solution:
Danger may arise without an enemy (natural hazards) or an attack; hate is unrelated.Fear, the emotional signal of threat, is the universal correlate.

Final Answer:
Fear