Saffi is the only one who is correct in labeling organisms as photosynthetic, specifically labeling plants and algae.
- Algae are photosynthetic organisms, along with plants.
- Mushrooms are fungi and do not perform photosynthesis, so Zola's labeling is incorrect.
- While some bacteria (specifically cyanobacteria) are photosynthetic, not all bacteria are, so Ahmed's labeling is also incorrect.
Therefore, the correct answer is Saffi only.