Mutually benefical relationship is called:

Options

A. Competition
B. Predation
C. Amensalism
D. Symbiosis

Answer

To answer the question, "Mutually beneficial relationship is called:", we need to analyze the options provided and understand the different types of relationships between organisms. Here’s a step-by-step solution:

### Step 1: Understand the Concept of Mutual Benefit
- A mutually beneficial relationship means that both organisms involved in the relationship gain benefits from each other. This type of interaction is characterized by a positive effect on both parties.

### Step 2: Analyze the Options
1. **Competition**: In competition, two organisms vie for the same resources, leading to a negative impact on both. This is a "minus and minus" relationship, so it is not mutually beneficial.

2. **Predation**: In predation, one organism (the predator) benefits by eating another organism (the prey), which is harmed. This is a "plus and minus" relationship, so it is also not mutually beneficial.

3. **Amensalism**: In amensalism, one organism is harmed while the other is unaffected. This results in a "plus and zero" relationship, which again does not indicate mutual benefit.

4. **Symbiosis**: In symbiosis, two organisms live closely together and both benefit from the relationship. This is a "plus and plus" relationship, indicating mutual benefit.

### Step 3: Conclusion
Based on the analysis of the options, the correct answer to the question is **Symbiosis**.

### Final Answer
**Mutually beneficial relationship is called: Symbiosis.**

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