Primary consumers are those that are herbivorous - they only eat producers. Primary consumers are the link between the base of an ecosystem's chain food - where simple substances are transformed into organic compounds by photosynthesis or chemosynthesis - and the upper layers - where energy is obtained from, mostly, other animals.
If primary consumers were not found in an ecosystem, all other layers of the chain food on that ecosystem would be nonexistent. The ecosystem would only be made by producers.
Photic zone is the the zone- the urface layer of the ocean that receives sunlight.It is also called the euphotic or limnetic zone. The sunlight enables<span> photosynthesis, so many plants and other photosynthetic organisms live in this zone and food is abundant.</span>
From the given options, the algae must live in the photic zone of the ocean biome.
