With which of four levels of biological organisation of Ecology is basically concerned?
A. Organisms B. Species C. Family D. Population E. Community F. Biomass

Options

A. A, B, C, D
B. A, C, D, E
C. A, D, E, F
D. B, D, E, F

Answer

To determine which of the four levels of biological organization of ecology is primarily concerned with the question, we need to analyze the given options one by one.

### Step-by-Step Solution:

1. **Understanding the Levels of Biological Organization**:
- The four main levels of biological organization in ecology are: Organism, Population, Community, and Ecosystem.

2. **Analyzing Each Option**:
- **A. Organism**: This refers to individual living entities. While it is a fundamental level, it does not encompass interactions or group dynamics.
- **B. Species**: This is a taxonomical category and does not represent a level of biological organization in ecology.
- **C. Family**: Similar to species, family is also a taxonomic classification and does not pertain to ecological organization.
- **D. Population**: This represents a group of individuals of the same species living in a specific area. It is a significant level of biological organization as it involves interactions among individuals.
- **E. Community**: This includes different populations interacting in a specific area. It is another crucial level of biological organization as it encompasses multiple species and their interactions.
- **F. Biomass**: This refers to the total mass of living matter in a given area. While it is related to ecological studies, it is not a level of biological organization.

3. **Identifying the Correct Options**:
- Based on the analysis, the relevant levels of biological organization that are concerned with ecology are:
- **D. Population**
- **E. Community**
- The options A (Organism) and F (Biomass) can also be considered in the broader context of ecological studies, but they are not the primary focus of the four levels of biological organization.

4. **Conclusion**:
- Therefore, the correct answer includes D (Population) and E (Community).

### Final Answer:
The levels of biological organization of ecology that are primarily concerned are **D. Population** and **E. Community**.

---