The correct answer is option 'B': BRICS Bank.

The Fortaleza Declaration is indeed related to the establishment of the BRICS Bank, also known as the New Development Bank (NDB). The declaration was signed by the leaders of Brazil, Russia, India, China, and South Africa, collectively known as the BRICS countries, during their sixth summit held in Fortaleza, Brazil, in July 2014.

The Fortaleza Declaration marked a significant milestone in the establishment of the BRICS Bank, which aims to provide financial support for infrastructure and sustainable development projects in the BRICS countries and other emerging economies. Here is a detailed explanation of the Fortaleza Declaration and its relation to the BRICS Bank:

1. Background:
- The BRICS countries are emerging economies with substantial economic potential and influence on the global stage.
- The idea of establishing a joint development bank among the BRICS nations was first proposed in 2012, with the aim of promoting financial cooperation and reducing dependence on Western-dominated institutions like the World Bank and the International Monetary Fund (IMF).

2. Objectives:
- The Fortaleza Declaration set forth the objectives and guiding principles of the BRICS Bank.
- The primary objective of the bank is to mobilize resources for infrastructure and sustainable development projects in the BRICS countries, as well as other emerging and developing economies.
- It aims to support projects that have a positive social, economic, and environmental impact, promoting inclusive and sustainable development.

3. Establishment of the BRICS Bank:
- The Fortaleza Declaration announced the establishment of the BRICS Bank, which was officially inaugurated in July 2015.
- The bank's headquarters are located in Shanghai, China.
- Initially, the bank started with an initial authorized capital of $100 billion, with an equal contribution from each of the five member countries.
- The bank's capital has since been increased to $200 billion, allowing for a greater capacity to fund development projects.

4. Functions and Operations:
- The BRICS Bank provides loans and assistance for infrastructure development, sustainable development projects, and technical assistance.
- It also supports the issuance of bonds to mobilize funds for development projects.
- The bank operates in a transparent and accountable manner, adhering to international best practices.

5. Relationship with Other Institutions:
- The BRICS Bank collaborates with other financial institutions, such as the Asian Infrastructure Investment Bank (AIIB) and the World Bank, to promote infrastructure development and sustainable growth.
- It aims to complement the efforts of existing institutions rather than competing with them.

In conclusion, the Fortaleza Declaration is related to the establishment of the BRICS Bank, which was initiated by the leaders of the BRICS countries to promote infrastructure and sustainable development projects in the member countries and other emerging economies. The declaration outlined the objectives, functions, and guiding principles of the bank, marking a significant step towards enhancing financial cooperation among the BRICS nations and reducing dependence on traditional Western-dominated institutions.