Question

1. the main steps of the cycle include photosynthesis, respiration, decomposition, and combustion. mark only one oval. water carbon nitrogen

Explanation:

Photosynthesis takes in carbon dioxide (\(CO_2\)) and converts it to organic carbon compounds. Respiration releases \(CO_2\) back into the atmosphere. Decomposition breaks down organic matter, releasing carbon. Combustion (e.g., of fossil fuels) also releases \(CO_2\). These are key processes in the carbon cycle. The water cycle involves processes like evaporation, condensation, and precipitation. The nitrogen cycle involves processes like nitrogen fixation, nitrification, and denitrification. So the cycle described is the carbon cycle.

Answer:

B. carbon