In a food chain, a lion is a 

• The food chain is a sequence of populations or organisms through which food and energy are passed in an ecosystem with the members of each trophic levels. 
• Green plants trap energy from the sun and then pass it to all the consumers occupying successive trophic levels. 
• The primary consumers consume producers and secondary consumer which are carnivores consume primary consumers. The loin is a secondary consumer.

Hence, the correct answer is option C.