Malaria is caused by a

Options

A. protozoan
B. virus
C. bacteria
D. fungi

Explanation

**Step-by-Step Solution:**

1. **Identify the Disease**: The question asks about the cause of malaria.

2. **Understand the Options**: The options provided are Protozoa, Virus, Bacteria, and Fungi. We need to determine which of these is responsible for malaria.

3. **Research the Causative Agent**: Malaria is known to be caused by a specific genus of organisms. In this case, it is important to identify the genus that causes malaria.

4. **Identify the Genus**: The genus responsible for malaria is called *Plasmodium*.

5. **List the Species**: There are four species of *Plasmodium* that cause malaria in humans:
- *Plasmodium falciparum*
- *Plasmodium vivax*
- *Plasmodium ovale*
- *Plasmodium malariae*

6. **Conclude the Answer**: Since *Plasmodium* is a type of protozoa, we can conclude that malaria is caused by protozoa.

7. **Final Answer**: The correct answer is that malaria is caused by a protozoa, specifically the genus *Plasmodium*.

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