The correct answer is option 'C': South-South Cooperation.

The G-77 summit is a forum for South-South Cooperation. Let's understand what South-South Cooperation means and why the G-77 summit serves as a platform for it.

South-South Cooperation:
South-South Cooperation refers to the collaboration and exchange of resources, knowledge, and technology among developing countries. It aims to promote economic growth, social progress, and sustainable development in the Global South. It emphasizes solidarity, mutual benefit, and shared experiences among countries of the global South.

The G-77:
The G-77 is a coalition of developing countries that was established in 1964 at the United Nations Conference on Trade and Development (UNCTAD). The group initially consisted of 77 countries, but it has since expanded to include 134 member countries. The G-77 represents the interests and priorities of developing countries in various international forums, including the United Nations.

Purpose of the G-77 Summit:
The G-77 summit provides a platform for member countries to come together and discuss issues of common concern, particularly those related to development and global governance. The summit offers an opportunity for developing countries to voice their perspectives, exchange ideas, and strengthen cooperation among themselves.

Key Areas of Focus:
1. Development Cooperation: The G-77 summit focuses on enhancing development cooperation among member countries. This includes sharing best practices, promoting technology transfer, and mobilizing resources for development projects.

2. Trade and Investment: The summit addresses issues related to trade and investment, with a focus on creating a favorable environment for developing countries to participate in the global economy. It emphasizes the need for fair and equitable trade agreements and increased market access for developing countries.

3. Climate Change and Sustainable Development: The G-77 summit also addresses the challenges of climate change and sustainable development. Member countries collaborate to promote environmentally friendly and sustainable development practices, as well as to advocate for the needs and concerns of developing countries in international climate negotiations.

4. Advocacy for Global South: The G-77 summit serves as a platform for developing countries to advocate for their interests and priorities in international forums. Member countries collectively voice their concerns on issues such as poverty eradication, social justice, and the reform of global institutions to better reflect the needs and aspirations of the Global South.

In conclusion, the G-77 summit is a forum for South-South Cooperation, providing a platform for developing countries to strengthen collaboration, exchange knowledge, and address common challenges. By fostering solidarity and mutual support, the G-77 aims to promote the development and well-being of its member countries.