Which group of animals belong to the same phylum ?

Options

A. Prawn, Scorpion, Locusta
B. Sponge, Sea anemone, Starfish
C. Malarial parasite, Amoeba, Mosquito
D. Earthworm, Pinworm, Tapeworm

Explanation

To determine which group of animals belong to the same phylum, we need to analyze the given options and identify the phylum each animal belongs to.

### Step-by-Step Solution:

1. **Identify the First Group: Prawn, Scorpion, Locusta**
- **Prawn**: This is a crustacean and has an exoskeleton made of chitin.
- **Scorpion**: This is an arachnid, also possessing an exoskeleton made of chitin.
- **Locusta (Locust)**: This is an insect, which similarly has an exoskeleton made of chitin.
- **Conclusion**: All three belong to the phylum **Arthropoda** due to the presence of an exoskeleton made of chitin.

2. **Identify the Second Group: Sponge, Sea Anemone, Starfish**
- **Sponge**: Belongs to the phylum **Porifera**.
- **Sea Anemone**: Belongs to the phylum **Cnidaria (Coelenterata)**.
- **Starfish**: Belongs to the phylum **Echinodermata**.
- **Conclusion**: These three animals belong to different phyla.

3. **Identify the Third Group: Malarial Parasite, Amoeba, Mosquito**
- **Malarial Parasite (Plasmodium)**: Belongs to the phylum **Protozoa**.
- **Amoeba**: Also belongs to the phylum **Protozoa**.
- **Mosquito**: Belongs to the phylum **Arthropoda**.
- **Conclusion**: This group contains animals from different phyla.

4. **Identify the Fourth Group: Earthworm, Pinworm, Tapeworm**
- **Earthworm**: Belongs to the phylum **Annelida**.
- **Pinworm**: Belongs to the phylum **Nematoda**.
- **Tapeworm**: Belongs to the phylum **Platyhelminthes**.
- **Conclusion**: These animals also belong to different phyla.

### Final Conclusion:
The only group of animals that belong to the same phylum is **Prawn, Scorpion, and Locusta**, which all belong to the phylum **Arthropoda**.