The vast array of different coral species on the reef are very beautiful. What are corals? Plants with bacteria on their leaves1Bacteria which photosynthesise2Animals with symbiotic algae in their tissue3Fungi growing on plant roots

Corals are animals with symbiotic algae in their tissue.

Here's a step-by-step explanation:

1. Corals are not plants, they are actually animals. They belong to the phylum Cnidaria, the same group as jellyfish and anemones.

2. Corals are not bacteria. They are multicellular organisms, much larger and more complex than bacteria.

3. Corals have a symbiotic relationship with a type of algae called zooxanthellae. The coral provides the algae with a protected environment and the compounds necessary for photosynthesis. In return, the algae produce oxygen and help the coral to remove wastes. Most importantly, they supply the coral with glucose, glycerol, and amino acids, which are the products of photosynthesis that the coral uses for energy.

4. Corals are not fungi. Fungi are a separate kingdom of organisms, distinct from animals and plants.

So, the correct answer is: Corals are animals with symbiotic algae in their tissue.