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Forests are called green lungs because plants release oxygen through:

APhotosynthesis
BRespiration
CTranspiration
DDecomposition
Answer & Solution
Correct answer: A. Photosynthesis
1. Plants make food using sunlight. 2. Photosynthesis releases oxygen. 3. Forests balance oxygen and carbon dioxide. _Source: syllabus Science, Chapter 17, Forests: Our Lifeline._
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