The biogeochemical cycle that is directly driven by lightening is

Options

A. Water
B. Nitrogen
C. Carbon
D. Phosphorus

Answer

To answer the question regarding which biogeochemical cycle is directly driven by lightning, we can follow these steps:

### Step 1: Understand Biogeochemical Cycles
Biogeochemical cycles involve the movement of chemical elements and compounds between living organisms and the environment. The cycles mentioned in the question are water, nitrogen, carbon, and phosphorus cycles.

**Hint:** Remember that biogeochemical cycles involve the transformation and movement of elements in ecosystems.

### Step 2: Analyze Each Cycle
- **Water Cycle:** This cycle involves processes like evaporation, condensation, and precipitation. It is not directly driven by lightning.

**Hint:** Think about the processes that involve water and whether lightning plays a role in them.

- **Nitrogen Cycle:** This cycle includes nitrogen fixation, which can occur through two main processes: biological fixation by bacteria and atmospheric fixation by lightning. Lightning can convert atmospheric nitrogen (N₂) into nitrates (NO₃⁻), which are usable by plants.

**Hint:** Consider how nitrogen is fixed in the environment and the role of lightning in this process.

- **Carbon Cycle:** This cycle involves the uptake of carbon dioxide by plants for photosynthesis. Lightning does not play a direct role in this cycle.

**Hint:** Focus on the primary processes involved in the carbon cycle and whether they are influenced by lightning.

- **Phosphorus Cycle:** This cycle involves the movement of phosphorus through rocks, soil, water, and living organisms. Lightning does not directly impact this cycle.

**Hint:** Think about the sources of phosphorus and how they are cycled in nature.

### Step 3: Identify the Cycle Driven by Lightning
From the analysis, it is clear that the nitrogen cycle is the only one that is directly influenced by lightning. Lightning helps in the conversion of atmospheric nitrogen into nitrates, which are essential for plant growth.

**Final Answer:** The biogeochemical cycle that is directly driven by lightning is the **Nitrogen Cycle**.