To be very general, producers make food from the sun, primary consumers eat them, secondary consumers eat them, and, depending on the ecosystem, a tertiary consumer or top consumer eats them.
Typical primary consumers are considered herbivorous (eating plant matter). Due to their feeding ecology and anatomical adaptations for a herbivorous diet, it is unlikely that a true primary consumer...
The food chain goes Producer > Primary > Secondary > Tertiary Primary consumers eat producers, which are organisms that use photosynthesis to produce energy. Do not let people tell you that...