Is Nitrogen the same as Nitrogen Dioxide (or included in the same category of Nitrogen)? Are they both considered the “most abundant gas in the atmosphere”?

primary is Rabbit while secondary is hawk

Explanation:

These organisms are called the producers, and they get their energy directly from sunlight and inorganic nutrients. The organisms that eat the producers are the primary consumers. ... The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers