What is a secondary consumer in eco system?

Answer 1

A secondary consumer is any organism that consumes an organism that has consumed an autotroph. An autotroph is eaten by a primary consumer, which is eaten by a secondary consumer. Put more simply, a secondary (or any further level) consumer is a predator/ carnivore. A primary consumer would be an herbivore, and an autotroph (also known as primary producer) is any organism that creates it own energy (generally plants).