What does IAEA stand for?

The correct answer is the International Atomic Energy Agency, commonly abbreviated as IAEA. This agency was established in 1957 to promote the peaceful use of nuclear energy and to prevent the proliferation of nuclear weapons. It is an autonomous international organization that works with member states and multiple stakeholders to ensure that nuclear technology is used safely and for beneficial purposes. The IAEA plays a critical role in various global issues, such as nuclear safety, security, and verification of nuclear materials.

In contrast, the other options do not reflect the official name or role of IAEA. The second option suggests a collaborative body that doesn't exist in this context. The third option references an organization that is not affiliated with nuclear energy at all. The fourth option has the word "Independent," which misrepresents the agency's function, as it operates collaboratively with member states and under the auspices of the United Nations. Hence, the official designation is indeed the International Atomic Energy Agency.