Final answer:
Bogs sequester 300 billion tons of carbon globally, playing a crucial role in trapping carbon that otherwise contributes to greenhouse gases.
Therefore, correct answer is option A .
Step-by-step explanation:
Bogs and other types of wetlands are vital ecosystems that provide the essential service of carbon sequestration, trapping carbon that would otherwise contribute to atmospheric greenhouse gases. In the context of global carbon cycles, bogs are especially potent as they sequester significant amounts of carbon all around the world. Terrestrial ecosystems, including bogs, have seen a loss of over 200 billion tons of carbon due to various human activities. This indicates the potential for these ecosystems to act as carbon sinks if they are restored and properly managed. Therefore, the correct answer to the question of how much carbon bogs sequester globally is 'B. 300 billion tons.'