Which of the following developments consolidated the environmental agenda in global politics in the late 20th century?

The correct option is The Brundtland Report and the subsequent Earth Summit.

Explanation

The integration of environmental concerns into global politics evolved significantly during the late 20th century. This period marked a shift from isolated conservation efforts to a comprehensive framework linking economic development with environmental protection, known as "Sustainable Development."

Option Analysis:

• The Brundtland Report and the subsequent Earth Summit Correct: The Brundtland Report (officially titled Our Common Future), published in 1987 by the World Commission on Environment and Development (WCED), introduced and popularized the definition of "Sustainable Development." This report set the stage for the United Nations Conference on Environment and Development (UNCED), also known as the Earth Summit, held in Rio de Janeiro in 1992. The Earth Summit resulted in critical global agreements like the UNFCCC, the Convention on Biological Diversity (CBD), and Agenda 21, thereby consolidating the environmental agenda in international politics.
• The Bretton Woods Conference and the Marshall Plan Incorrect: The Bretton Woods Conference (1944) established the International Monetary Fund (IMF) and the World Bank to regulate the international monetary and financial order. The Marshall Plan (1948) was a U.S. initiative to aid Western Europe's economic recovery after World War II. Both were primarily economic and geopolitical developments.
• The Bandung Conference and the Non-Aligned Movement Incorrect: The Bandung Conference (1955) was a meeting of Asian and African states to promote economic and cultural cooperation and oppose colonialism. It paved the way for the Non-Aligned Movement (NAM). These events were central to decolonization and Cold War geopolitics, not the environmental agenda.
• The Tashkent Declaration and the Stockholm Accords Incorrect: The Tashkent Declaration (1966) was a peace agreement between India and Pakistan following the 1965 war. While the Stockholm Conference (1972) was a seminal event for the environment, the Tashkent Declaration is unrelated. Furthermore, the consolidation of the agenda into a global political framework is best represented by the Brundtland-Rio progression in the late 1980s and 1990s.

Key Takeaway:
The Brundtland Report (1987) provided the theoretical framework for sustainable development, which was institutionally consolidated and adopted globally at the Rio Earth Summit (1992).