The taxon which includes related species is

Options

A. class
B. order
C. family
D. genus

Explanation

To solve the question "The taxon which includes related species is," we will follow these steps:

### Step-by-Step Solution:

1. **Understand Taxonomic Hierarchy**:
- Taxonomy is the science of classifying organisms. The hierarchy starts from broad categories and narrows down to specific ones. The main levels of this hierarchy are:
- Kingdom
- Phylum
- Class
- Order
- Family
- Genus
- Species

2. **Identify the Levels**:
- Each level in the hierarchy contains the next lower level. For example:
- A Kingdom contains multiple Phyla.
- A Phylum contains multiple Classes.
- A Class contains multiple Orders.
- An Order contains multiple Families.
- A Family contains multiple Genera (plural of Genus).
- A Genus contains multiple Species.

3. **Focus on the Question**:
- The question specifically asks for the taxon that includes related species.

4. **Analyze the Options**:
- **Class**: Contains related Orders.
- **Order**: Contains related Families.
- **Family**: Contains related Genera.
- **Genus**: Contains related Species.

5. **Determine the Correct Answer**:
- Since the question asks for the taxon that includes related species, the correct answer is **Genus**. This is because a Genus is the taxonomic category that directly contains species that are closely related to each other.

### Final Answer:
The taxon which includes related species is **Genus**.

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