Malaria and sleeping sickness caused by :

Options

A. Algae
B. Protozoa
C. Bacteria
D. Fungi

Explanation

### Step-by-Step Solution:

1. **Identify the Diseases**: We need to determine the causative agents of two diseases: Malaria and Sleeping Sickness.

2. **Causative Agent of Malaria**:
- Malaria is caused by a protozoan parasite known as *Plasmodium*.
- There are several species of *Plasmodium*, with *Plasmodium falciparum* being the most deadly.

3. **Causative Agent of Sleeping Sickness**:
- Sleeping sickness is also caused by a protozoan parasite, specifically belonging to the genus *Trypanosoma*.
- The disease is transmitted by the tsetse fly and is known as African sleeping sickness.

4. **Conclusion**: Both Malaria and Sleeping Sickness are caused by protozoa. Therefore, the correct answer to the question is "protozoa".

### Final Answer:
Malaria and Sleeping Sickness are caused by protozoa.

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