Niche overlap indicates

Options

A. active cooperation between two species
B. two different parasites on the same host
C. sharing of one or more resources between the two species
D. mutualism between two species

Answer

### Step-by-Step Solution:

1. **Understanding Niche**:
- A niche refers to the role or function of an organism within its environment, including its habitat, resource use, and interactions with other organisms. It encompasses the conditions and resources necessary for a species to survive and reproduce.

2. **Defining Niche Overlap**:
- Niche overlap occurs when two or more species share the same resources within an ecosystem. This can happen when their niches are similar, leading to competition for those resources.

3. **Implications of Niche Overlap**:
- When niches overlap, it indicates that the species are competing for the same resources. This competition can lead to one species being favored over the other, potentially harming the less dominant species.

4. **Types of Interactions**:
- In the context of niche overlap, interactions can include competition, where species vie for limited resources, rather than cooperation or mutualism. Mutualism implies a beneficial relationship for both species, which is not the case in niche overlap due to the competition.

5. **Conclusion**:
- Therefore, niche overlap indicates competition between species for shared resources, rather than cooperation or mutualistic relationships. It highlights the struggle for survival in environments where resources are limited.