Answer: Crowd
Explanation: Every gathering of people who are close enough to communicate without some established rules or without any organization is a crowd.
Panic is a sudden fear due to an unexpected event or attack, and the reaction is a ruthless and spontaneous behavior to avoid a threat.
The public implies all people and their behavior, thinking, but not in some sudden and unforeseen situations, but usually.
Moral panic occurs when a new or different moral system arises in a society with established moral values, which causes panic in the moral sense.
Mass or collective hysteria represents collectively obsessive behavior due to the illusion of a real or imaginary threat, and is transmitted through rumors.
Mob is the emotional exploitation of a particular individual or group with some clear purpose or benefits.
Fad refers not to some unconventional behavior that is associated with a particular group of people in a very short time.