Which type of cycle includes processes like nitrification and denitrification in its sequence?

The Nitrogen Cycle is the correct answer because it encompasses the processes of nitrification and denitrification, which are critical steps in the transformation and movement of nitrogen through various environmental systems.

Nitrification involves the conversion of ammonia (NH3) into nitrites (NO2-) and then into nitrates (NO3-), which are forms of nitrogen that plants can readily absorb and use for growth. This process typically occurs in the soil and is facilitated by specific bacteria. On the other hand, denitrification is the process where nitrates are converted back into nitrogen gas (N2) through the action of denitrifying bacteria, effectively returning nitrogen to the atmosphere and closing the loop of the cycle.

The nitrogen cycle's focus on these transformations highlights the essential role nitrogen plays in ecosystems, particularly in supporting plant life and, consequently, the entire food web. This cycle is crucial for maintaining the balance of nitrogen in the environment, which is vital for all living organisms.