The correct answer is: A. United Nations Decade of Education for Sustainable Development.
The United Nations declared 2005-2014 as the International Decade of Education for Sustainable Development (DESD) to promote education for sustainable development (ESD) as a key driver of change towards a more sustainable future. The DESD was launched at the World Summit on Sustainable Development in Johannesburg in 2002.
The DESD was based on the recognition that education is essential for achieving sustainable development. ESD aims to help people understand the complex interrelationships between the environment, society and the economy, and to develop the knowledge, skills and values they need to live more sustainably.
The DESD was a global initiative, and was implemented by governments, civil society organizations, schools, universities and other stakeholders around the world. The DESD came to an end in 2014, but the work of ESD continues.
Option B is incorrect because the First International Decade of the World’s Indigenous People was 1995-2004.
Option C is incorrect because the Second International Decade for the Eradication of Colonialism was 1990-2000.
Option D is incorrect because the International Decade for Nature Disaster Reduction was 1990-1999.