Step 1: Understanding the Question:
This question falls under the one-word substitution category of English vocabulary, testing terms related to forms of government and political states.
Step 2: Key Formulas and approach:
Examine the definitions of all political terms presented in the options to see which one corresponds to the complete absence of government and subsequent lawlessness.
Step 3: Detailed Explanation:
$\bullet$ Option (A) "Tyranny" refers to a government ruled by a cruel and oppressive dictator with absolute power. There is government control, but it is unjust.
$\bullet$ Option (B) "Oligarchy" is a system where power is held by a small, elite group of people. Government control is present.
$\bullet$ Option (C) "Anarchy" comes from the Greek prefix "an-" (without) and "arkhos" (ruler). It literally means a society without a public authority or government, resulting in a state of political disorder and lawlessness. This matches the prompt perfectly.
$\bullet$ Option (D) "Autocracy" is a system of government by one person with absolute power. Control is highly centralized.
Step 4: Final Answer:
The term that correctly substitutes the given definition is "Anarchy", which is Option (C).