Which one is example of ectoparasite:

Options

A. Ticks
B. Plasmodium
C. Ascaris
D. Taenia.

Answer

To determine which option is an example of an ectoparasite, we need to understand what ectoparasites are and analyze the given options.

### Step-by-Step Solution:

1. **Define Ectoparasites**: Ectoparasites are organisms that live on the outside of their host's body. They derive nutrients from the host while remaining externally attached.

2. **List the Options**: The options provided are:
- A) Ticks
- B) Plasmodium
- C) Ascaris
- D) Taenia

3. **Analyze Each Option**:
- **A) Ticks**: Ticks are known to attach to the skin of their hosts and feed on their blood. This makes ticks ectoparasites.
- **B) Plasmodium**: Plasmodium is a genus of parasites that cause malaria and live inside the host's red blood cells. This makes it an endoparasite.
- **C) Ascaris**: Ascaris is a genus of parasitic worms that live in the intestines of their hosts. This is also an endoparasite.
- **D) Taenia**: Taenia is a genus of tapeworms that live in the intestines of their hosts, making it an endoparasite as well.

4. **Conclusion**: Among the options, the only organism that qualifies as an ectoparasite is **Ticks**.

### Final Answer:
The example of an ectoparasite is **Ticks**.

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