To determine which interaction is detrimental to both partners in a relationship, we need to analyze the different types of ecological interactions. Here’s a step-by-step solution:
### Step 1: Understand the Types of Interactions
- Ecological interactions can be classified into various types, including competition, predation, parasitism, and mutualism. Each of these interactions has different effects on the organisms involved.
### Step 2: Define Detrimental Interaction
- A detrimental interaction is one where both partners are negatively affected. This can be represented by a “minus minus” sign (- -).
### Step 3: Analyze Each Interaction
1. **Competition**:
- In competition, two species (Species A and Species B) compete for the same limited resources (like food, space, or light). Since both species are vying for the same resources, they both suffer from reduced availability, leading to a detrimental effect on both.
2. **Predation**:
- In predation, one organism (the predator) benefits by feeding on another organism (the prey). Here, the predator has a positive effect, while the prey is negatively affected. Thus, this interaction is not detrimental to both.
3. **Parasitism**:
- In parasitism, the parasite benefits at the expense of the host. The host suffers negative effects such as weakened health and reduced reproductive success. Again, this interaction is not detrimental to both.
4. **Mutualism**:
- In mutualism, both organisms benefit from the relationship. For example, plants and pollinators both gain advantages, making this interaction positive for both.
### Step 4: Identify the Correct Answer
- Based on the analysis, the only interaction that is detrimental to both partners is **competition**. Therefore, the correct answer is **option 1: Competition**.
### Final Answer
The interaction that is detrimental to both partners in the relationship is **competition**.
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