GENERAL KNOWLEDGE

Detailed explanation-1: -Humans are both primary and secondary consumers. Humans are essentially carnivores. They feed directly on producers likes vegetables becoming the primary consumers. Humans also feed on primary consumers like chicken and goats thereby becoming the secondary consumers.

Detailed explanation-2: -Humans are an example of a tertiary consumer.

Detailed explanation-3: -Humans are omnivores, therefore can occupy different trophic levels in a food chain. He can be the primary consumer if he feeds directly on green plants. He can also be the secondary consumer if he feed on a primary consumer (like goat) which directly eats plants.