The Rio de Janeiro Earth Summit, 1992 was convened to address

Correct option is D

The Rio de Janeiro Earth Summit, 1992, officially known as the United Nations Conference on Environment and Development (UNCED), was convened primarily to address both the urgent problems of environmental protection and the socio-economic development at the global level. The summit was a pivotal point in global environmental diplomacy, bringing together representatives from over 178 countries to deliberate on issues such as climate change, biodiversity loss, and sustainable development. The outcomes of the summit included the adoption of Agenda 21, a comprehensive plan of action to be taken globally, nationally, and locally by organizations of the United Nations, governments, and major groups in every area in which humans impact the environment. This makes option (d) correct, as it encapsulates the multifaceted objectives of the summit, excluding the political crisis of the developed world, which was not a focus of the summit.