Dependency Theory suggests that middle-income countries, such as India and Brazil, are entirely self-sufficient and do not rely on the economic core for growth.

Dependency Theory actually argues the opposite of what you've stated. It suggests that middle-income countries like India and Brazil often depend on wealthier, developed nations for their economic growth. This means that while they may have some self-sufficiency, their economies can still be heavily influenced by the decisions and actions of more powerful countries. For example, if a developed country decides to reduce its imports from Brazil, it could negatively impact Brazil's economy, showing how interconnected and dependent they are. Therefore, Dependency Theory highlights the challenges these countries face in achieving true independence and sustainable growth.