The correct answer is: B. International Heliophysical Year
The United Nations declared 2007 as the International Heliophysical Year (IHY) to celebrate the 50th anniversary of the International Geophysical Year (IGY). The IGY was a worldwide scientific research effort that took place from July 1, 1957, to December 31, 1958. The IGY was a major success, and it led to a number of important scientific discoveries, including the discovery of the Van Allen radiation belts and the confirmation of the existence of the solar wind.
The IHY was a joint effort of the International Council of Scientific Unions (ICSU) and the United Nations Educational, Scientific and Cultural Organization (UNESCO). The IHY was organized into four major themes: the Sun, the Earth’s atmosphere, the Earth’s magnetosphere, and the interplanetary medium.
The IHY was a major success, and it led to a number of important scientific discoveries. The IHY also helped to promote international cooperation in science.
The following are the other options:
A. Year of the Dolphin
The United Nations did not declare 2007 as the Year of the Dolphin. The United Nations declared 2007 as the International Year of the Dolphin. The International Year of the Dolphin was a global celebration of dolphins and their conservation. The International Year of the Dolphin was organized by the World Wide Fund for Nature (WWF).C. Year of the Rights of Internally Displaced Persons in Colombia
The United Nations did not declare 2007 as the Year of the Rights of Internally Displaced Persons in Colombia. The United Nations declared 2006 as the International Year of the Mountains. The International Year of the Mountains was a global celebration of mountains and their importance to people and the planet. The International Year of the Mountains was organized by the United Nations Educational, Scientific and Cultural Organization (UNESCO).