Two species compete to each other even in presence of large quantity of food. The relationship is :

Options

A. mutualism
B. antagonism
C. isolation
D. Commensalism

Answer

To solve the question about the relationship between two species that compete with each other even in the presence of a large quantity of food, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Nature of the Relationship**: The question specifies that two species are competing with each other. This indicates that there is some form of interaction between them.

2. **Consider the Availability of Resources**: The problem states that there is a large quantity of food available. This is crucial because it suggests that the competition is not due to a scarcity of resources.

3. **Analyze the Options**:
- **Mutualism**: This is a relationship where both species benefit from the interaction. However, mutualism typically does not involve competition.
- **Antagonism**: This involves one species benefiting at the expense of another, which does not fit the scenario of competition with abundant resources.
- **Isolation**: This term refers to species being separated and not interacting, which does not apply here.
- **Commensalism**: In this relationship, one species benefits while the other is neither helped nor harmed. This does not describe competition.

4. **Conclusion**: Since the question describes a situation where two species are competing despite the availability of resources, it suggests that they are vying for dominance or territory rather than food itself. Therefore, the most appropriate term for this relationship is **competition**, which is not listed in the options. However, based on the context, the best fit would be **antagonism**, as it reflects a competitive relationship.

### Final Answer:
The relationship is best described as **antagonism**.