Consider the following tree diagram: 
Which of the following nodes are siblings?
Definitions:
Dambisa Moyo
An international economist and author known for her works on global economic issues and development in emerging economies.
Foreign Aid
Economic, technical, or military assistance given by one country to another for purposes of relief and rehabilitation, for economic stabilization, or for mutual defense.
Aid Agency
An organization, often part of the government or non-profit sector, dedicated to providing financial or logistical support to countries or individuals in need.
Multilateral Aid Agency
An organization that provides support or resources to developing countries, funded by multiple government or institutional donors.
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