Alexandar Von Humboldt described for the first time:

Options

A. Ecological Biodiversity
B. Laws of limiting factor
C. Species area relationships
D. Population Growth equation

Answer

**Step-by-Step Solution:**

1. **Identify the Scientist and Context**: The question asks about Alexander von Humboldt and what he described for the first time. Humboldt was a prominent figure in the field of ecology and geography.

2. **Review the Options**: The options provided are:
- A) Ecological biodiversity
- B) Laws of limiting factors
- C) Species-area relationship
- D) Population growth equation

3. **Recall Humboldt's Contributions**: Alexander von Humboldt is known for his extensive studies in ecology and biogeography. One of his significant contributions is the concept of the species-area relationship.

4. **Define the Species-Area Relationship**: The species-area relationship describes how the number of species increases with the area sampled. As the area increases, the number of species tends to increase, but this increase occurs up to a certain limit.

5. **Mathematical Representation**: Humboldt explained this relationship using a mathematical formula:
\[ S = C \cdot A^Z \]
where:
- \( S \) = species richness
- \( C \) = constant
- \( A \) = area
- \( Z \) = regression constant

6. **Conclusion**: Based on the contributions of Alexander von Humboldt, the correct answer to the question is **C) Species-area relationship**.

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