To determine which characters change with altitude and latitude, we will analyze each option provided in the question.
### Step-by-Step Solution:
1. **Understanding Altitude and Latitude**:
- **Altitude** refers to the height of a location above sea level. As altitude increases, temperature generally decreases.
- **Latitude** refers to the distance north or south of the equator. It influences climate and temperature as well.
2. **Analyzing Temperature**:
- As altitude increases, temperature decreases due to the thinning atmosphere. Similarly, latitude affects temperature; areas closer to the equator are warmer, while those near the poles are cooler.
- **Conclusion**: Temperature changes with both altitude and latitude.
3. **Analyzing Vegetation**:
- Vegetation types vary significantly with altitude and latitude. For instance, tropical forests are found at lower altitudes and latitudes, while alpine vegetation is found at higher altitudes.
- **Conclusion**: Vegetation changes with both altitude and latitude.
4. **Analyzing Species Composition**:
- Species composition is influenced by climatic conditions, which vary with altitude and latitude. Warmer and more humid climates support a greater diversity of species, while colder and drier conditions at higher altitudes and latitudes lead to fewer species.
- **Conclusion**: Species composition changes with both altitude and latitude.
5. **Analyzing Productivity**:
- Productivity, or the rate of photosynthesis and biomass production, is affected by temperature and moisture availability, which vary with altitude and latitude. Higher altitudes often have lower productivity due to harsher conditions.
- **Conclusion**: Productivity changes with both altitude and latitude.
6. **Final Conclusion**:
- All four characters (Temperature, Vegetation, Species Composition, and Productivity) are influenced by changes in altitude and latitude. Therefore, the correct answer is that all options are correct.
### Final Answer:
All of the characters (I. Temperature, II. Vegetation, III. Species composition, IV. Productivity) change with altitude and latitude.
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