Extortion:
Extortion occurs when someone attempts to obtain money or property by threatening to commit violence, accuse the victim of a crime, or reveal private or damaging information about the victim.
Act of terror
Individuals and groups choose terrorism as a tactic because it can: Act as a form of asymmetric warfare in order to directly force a government to agree to demands. Get attention and thus political support for a cause.
Kidnapping
Kidnapping, also spelled kidnaping, criminal offense consisting of the unlawful taking and carrying away of a person by force or fraud or the unlawful seizure and detention of a person against his will.
Note: I do not know if this is the answer you were hoping to get but I tried to answer the question correctly... I hope this helped :)
