This cloze test question requires the word that correctly fills gap 8. The passage discusses the United Nations Security Council, and gap 7 has been filled with "peace" to form part of the phrase describing the Council's mandate.
The correct word is security. The complete phrase is "international peace and security," which is the standard formulation used throughout the UN Charter to describe what the Security Council exists to maintain. This is a fixed collocation in international law and diplomacy.
The other options do not complete the phrase correctly:
"Safety" is a general English word but is not the term used in UN Charter language. "Peace and safety" is not the standard diplomatic formulation.
"Unity" does not pair with "peace" in this context. While unity is a desirable goal, it is not the specific term the Charter uses alongside peace.
"Progress" refers to advancement or development, which is a separate concern from the Security Council's primary mandate of maintaining peace.
