Answer:
In the given list, the microalgae is an example of a producer.
Step-by-step explanation:
Producers are organisms that can create their own food through photosynthesis or chemosynthesis. They are able to convert sunlight or chemical energy into organic compounds, such as sugars, that serve as food for other organisms in the food chain.
In this list, the microalgae is the only organism that can perform photosynthesis. It contains chlorophyll, a pigment that enables it to capture sunlight and convert it into energy. Through photosynthesis, microalgae can produce organic compounds that provide food for other organisms, including the rockskipper, convict tang, damselfish, and manta ray.
Therefore, among the given organisms, the microalgae is the producer as it can produce its own food through photosynthesis.