Biology

The correct answer is: B.both add carbon to the atmosphere

Explanation:

Both the burning of fossil fuels and volcanic eruptions release carbon dioxide (CO₂) into the atmosphere, which affects the carbon cycle in similar ways.

1.Burning of fossil fuels: When fossil fuels (such as coal, oil, and natural gas) are burned for energy, they release carbon that has been stored for millions of years into the atmosphere in the form of CO₂. This process increases the concentration of carbon in the atmosphere, contributing to the greenhouse effect and climate change.

2.Volcanic eruptions: Volcanic eruptions release carbon dioxide (and other gases) from Earth's interior into the atmosphere. Carbon is stored in the Earth's mantle and crust, and volcanic eruptions release it back into the atmosphere as CO₂. This is a natural part of the Earth's carbon cycle, though human activities like burning fossil fuels have made this process more significant in recent times.

Why the other options are incorrect:

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