Meaning: 'Prevent' means to stop something from happening, in this case, future conflicts.

Wrong options:

• harness: 'Harness' means to control or make use of something, which does not fit the context of stopping conflicts.
• narrate: 'Narrate' means to tell a story or recount events, which is irrelevant to the context of conflict resolution.
• impose: 'Impose' means to force something upon others, which contradicts the cooperative intent of the UN.

Correct answer: comprised

Explanation: 'Comprised' is the correct term as it indicates that the initial membership was made up of 51 countries, fitting grammatically and contextually as it describes the composition of the UN's membership.

Meaning: 'Comprised' means to consist of or be made up of, referring to the countries that formed the UN.

Wrong options:

• contrasted: 'Contrasted' means to compare in such a way as to emphasize differences, which does not apply to the context of membership.
• consisted: 'Consisted' could fit but is less precise than 'comprised' in this context, as 'comprised' directly indicates the makeup of the membership.
• compared: 'Compared' means to examine similarities and differences, which is not relevant to describing membership.

Correct answer: development

Explanation: 'Development' is the appropriate choice as it refers to economic growth and progress, which aligns with the UN's goals of fostering economic improvement among nations.

Meaning: 'Development' means the process of developing or being developed, particularly in economic terms.

Wrong options:

• ornament: 'Ornament' refers to a decorative object, which is unrelated to economic progress.
• posterity: 'Posterity' means future generations, which does not fit the context of economic goals.
• velocity: 'Velocity' refers to speed, which is not applicable in the context of economic growth.

Correct answer: confront

Explanation: 'Confront' is the correct answer as it indicates the UN's proactive approach to addressing emerging challenges, fitting both grammatically and contextually.

Meaning: 'Confront' means to face or deal with a challenge directly.

Wrong options:

• mute: 'Mute' means to silence or make quiet, which contradicts the active role of the UN in addressing challenges.
• camouflage: 'Camouflage' means to disguise or conceal, which does not align with the UN's mission to address issues openly.
• dismantle: 'Dismantle' means to take apart or destroy, which is contrary to the UN's goal of confronting and solving challenges.

Correct answer: pivotal

Explanation: 'Pivotal' is the correct choice as it describes the UN as being crucial or central to international affairs, fitting the context of its significant role.

Meaning: 'Pivotal' means of crucial importance in relation to the development or success of something.

Wrong options:

• dissident: 'Dissident' refers to a person who opposes official policy, which does not describe the UN's role.
• possessed: 'Possessed' means to have or own something, which is irrelevant in this context.
• tropical: 'Tropical' refers to a climate zone, which has no relation to the UN's function in international affairs.