Question

Which of the following contributes to the carbon cycle?
A. Photosynthesis
B. Respiration
C. Fossil fuel combustion
D. All of these

Answer 1

Hint:
Before we proceed into the problem, it is important to know the definition of the carbon cycle.
The carbon cycle is the process by which Earth exchanges gases and soils with the atmosphere. It is important to keep track of this cycle because it affects climate and our environment. Each year, around 650 million metric tons of carbon is released from plants and soil into the air as CO₂ which then reacts with water vapour to create clouds and rain.

Complete step by step answer:
The carbon cycle is a biogeochemical cycle that aids in nutrient recycling. Plants use atmospheric carbon dioxide for photosynthesis to prepare food, and oxygen is released. The creatures consume plants, use oxygen for respiration, and emit carbon dioxide.
Hydrocarbons, which are burned for energy, make up fossil fuels. The fumes produced by the combustion of fuels contain carbon particles, carbon dioxide, and monoxide gases.
Therefore, photosynthesis, respiration and fossil fuel combustion all contribute to the carbon cycle.

Option ‘D’ is correct

Note:
The carbon cycle is the process by which carbon moves through the Earth's atmosphere, oceans, and crust. It helps to regulate the level of CO₂ in our atmosphere and ensures that plants can absorb enough sunlight to create food. The cycle also helps in removing plant debris from the soil and converting it into organic matter. This process plays a vital role in sustaining life on earth.