Fishes, amphibians, reptiles, birds and mammals constitute in the same category, called

Options

A. Division
B. Phylum
C. Order
D. Class

Explanation

To solve the question regarding the category that includes fishes, amphibians, reptiles, birds, and mammals, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Groups**: First, we need to recognize the groups mentioned in the question: fishes, amphibians, reptiles, birds, and mammals.

2. **Determine Common Characteristics**: Next, we should identify the common characteristics of these groups. All of them are vertebrates, meaning they have a backbone.

3. **Understand Taxonomy Levels**: In biological classification, organisms are grouped into different taxonomic ranks such as domain, kingdom, phylum, class, order, family, genus, and species.

4. **Analyze the Options**: The options provided are:
- A) Division
- B) Phylum
- C) Order
- D) Class

5. **Eliminate Incorrect Options**:
- **Option A (Division)**: This term is primarily used in the classification of plants, not animals. Therefore, it can be eliminated.
- **Option C (Order)**: This is a lower taxonomic rank and does not encompass all the groups mentioned. Thus, it can also be eliminated.
- **Option D (Class)**: While this could potentially include some of the groups, it does not encompass all of them together.

6. **Identify the Correct Answer**: The correct category that includes all these groups is **Phylum**. They all belong to the phylum **Chordata**, which is characterized by the presence of a notochord at some stage of their development.

### Conclusion:
Thus, the correct answer to the question is **B) Phylum**.

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