Population is a group of individuals of a single species living in a given area. It includes spatial arrangement, genetic variation and the dynamics including natality, mortality, biotic potential, carrying capacity, etc. Population structure includes features as density, abundance, spacing, genetic variations. The genetic structure reveals genetic variations and population size.
________ is the study of the ecology of population.

Options

A. Autocology
B. Demecology
C. Endaphology
D. None of the above

Explanation

To solve the question regarding the study of the ecology of populations, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Population**:
- A population is defined as a group of individuals of the same species living in a specific area. It encompasses various dynamics such as natality (birth rate), mortality (death rate), biotic potential (capacity of an organism to reproduce), and carrying capacity (maximum population size that the environment can sustain).

2. **Identify Key Terms Related to Population**:
- The question mentions attributes of populations including density, abundance, spacing, and genetic variations. Understanding these terms is crucial as they relate to how populations are structured and function.

3. **Recognize the Focus of the Question**:
- The question specifically asks for the term that refers to the study of the ecology of populations. This implies we need to find a term that encompasses the relationships and dynamics of populations within their ecosystems.

4. **Evaluate the Given Options**:
- **Aut-ecology**: This term refers to the study of a single species in relation to its environment. It does not encompass populations but focuses on individual species.
- **Dem Ecology**: This term (often referred to as "demography") studies the dynamics of populations, including their size, density, distribution, and the relationships between organisms and their environment.
- **Edaphology**: This is the study of soil in relation to plant growth and does not pertain to population ecology.

5. **Select the Correct Answer**:
- Based on the definitions and evaluations, the correct answer is **Dem Ecology**, as it specifically addresses the ecology of populations.

### Final Answer:
**Dem Ecology** is the study of the ecology of population.