Which of the following activities decrease the amount of CO2 in atmos…

The correct answer is Option (2)- Photosynthesis

The only activity that decreases the amount of CO₂ in the atmosphere is Photosynthesis.

Respiration, burning of forests, and combustion of fossil fuels all release CO₂ into the atmosphere. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy. During photosynthesis, plants absorb carbon dioxide from the air and use it to make sugar. This process helps to reduce the amount of CO2 in the atmosphere.

Here is a brief explanation of each activity:

• Respiration: The process by which all living organisms break down food to release energy. Respiration releases carbon dioxide into the air.
• Burning of forests: When forests are burned, the trees release carbon dioxide into the air.
• Combustion of fossil fuels: When fossil fuels, such as coal, oil, and natural gas, are burned, they release carbon dioxide into the air.

It is important to note that all of these activities contribute to climate change. Climate change is caused by the release of greenhouse gases, such as carbon dioxide, into the atmosphere. Greenhouse gases trap heat in the atmosphere, causing the planet to warm.