An animal related to spider is

Options

A. Palamnaeus
B. Mosquito
C. Crab
D. Housefly.

Answer

To determine which animal is related to a spider, we need to analyze the characteristics of the options provided and their classification within the phylum Arthropoda.

### Step-by-Step Solution:

1. **Identify the Class of Spider**:
- Spiders belong to the class **Arachnida** within the phylum **Arthropoda**. This class is characterized by having **four pairs of jointed appendages**, totaling **eight appendages**.

2. **Examine the Options**:
- The options given are:
- **Pelameus**
- **Mosquito**
- **Crab**
- **Housefly**

3. **Analyze Each Option**:
- **Pelameus**: This is the scientific name for **scorpions**, which also belong to the class **Arachnida**. They share the same characteristic of having four pairs of appendages, making them closely related to spiders.
- **Mosquito**: Mosquitoes belong to the class **Insecta**, which is characterized by having **three pairs of jointed appendages** (six total). Therefore, they are not closely related to spiders.
- **Crab**: Crabs belong to the class of **Crustacea**, which is another class within the phylum Arthropoda but is distinct from Arachnida. They typically have five pairs of appendages.
- **Housefly**: Like mosquitoes, houseflies also belong to the class **Insecta** and have three pairs of jointed appendages.

4. **Conclusion**:
- The only option that is related to spiders (which are in Arachnida) is **Pelameus (scorpion)**. Therefore, the correct answer is **option 1: Pelameus**.

### Final Answer:
**Option 1: Pelameus**