Carbon dioxide is A a toxic gas produced by landfills. B produced by plants during photosynthesis. C needed by industry to power generators. D a greenhouse gas that traps heat in the atmosphere.

The correct answer is option D, that is, a greenhouse gas that traps heat in the atmosphere.

Explanation:

A natural phenomenon in which the atmospheric gases captivates heat and permits Earth to retain enough solar energy to be livable is termed as the greenhouse effect. The greenhouse gases are the methane, carbon dioxide, nitrous oxide, and other gases, which gathers in the atmosphere and produces a heat-reflective layer that helps in trapping sunlight and keeps the Earth warm.  

Of these greenhouse gases, carbon dioxide is the largest contributor to climate change. It is largely emitted at the time of burning fossil fuels like natural gas, oil, and other carbon-rich sources. Due to this, the level of carbon dioxide increases in the atmosphere resulting in the global phenomenon termed global warming.  

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