Carrying capacity is the capacity of

Options

A. habitat that has resources to sustain certain number of individuals
B. population to reproduce and competitiveness
C. population to reproduce
D. individuals to fit among the natural environment

Answer

**Step-by-Step Solution:**

1. **Understanding Carrying Capacity**:
- Carrying capacity refers to the maximum number of individuals of a particular species that an environment can sustainably support. It is determined by the availability of resources such as food, water, and habitat space.

2. **Factors Influencing Carrying Capacity**:
- Several factors can limit the carrying capacity of an environment:
- **Food Availability**: As the population increases, the demand for food also increases. If food resources are limited, it can lead to a decrease in population size.
- **Water Supply**: Similar to food, the availability of water is crucial. A decrease in water supply can limit the number of individuals that can survive in a habitat.
- **Space**: Limited living space can lead to overcrowding, which can increase competition for resources and ultimately affect population size.
- **Disease and Predation**: High population density can lead to the spread of diseases and increase predation, both of which can reduce population numbers.

3. **Conclusion**:
- The carrying capacity is fundamentally about the capacity of a habitat to sustain a certain number of individuals based on the resources available and the limiting factors present in that environment.

4. **Identifying the Correct Option**:
- Given the options provided, the first option states: "Carrying capacity is the capacity of habitat that has resources which sustain a certain number of individuals." This accurately reflects the definition and understanding of carrying capacity, making it the correct answer.

**Final Answer**:
- The correct answer is option 1: "Carrying capacity is the capacity of habitat that has resources which sustain a certain number of individuals."

---