Spiders and Scorpions belong to class

Options

A. Arachnida
B. Anthozoa
C. Crustacea
D. Onychophora.

Answer

To answer the question regarding the class to which spiders and scorpions belong, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Phylum**:
- Spiders and scorpions are part of the phylum Arthropoda. This phylum includes all joint-legged invertebrates.

2. **Classify the Organisms**:
- Within the phylum Arthropoda, there are several classes. The relevant classes mentioned in the options are Arachnida, Anthozoa, Crustacea, and Onychophora.

3. **Determine the Correct Class**:
- Spiders and scorpions are specifically classified under the class Arachnida. This class is characterized by having eight legs and includes other arachnids like ticks and mites.

4. **Eliminate Incorrect Options**:
- Anthozoa refers to a class of marine invertebrates that includes corals and sea anemones.
- Crustacea includes animals like crabs and lobsters.
- Onychophora refers to velvet worms, which are not arachnids.

5. **Conclude the Answer**:
- Therefore, the correct class for spiders and scorpions is Arachnida.

### Final Answer:
Spiders and scorpions belong to the class **Arachnida**.

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