Answer:
Sugar
Explanation:
The carbon is in form of sugar prior to the lion eating the giraffe. This form of carbon in the giraffe serves as a rich source of nutrient for the lion.
The carbon enters living organisms as carbon dioxide. As it enters, it is converted by plants into glucose, a from of sugar.
When giraffes eats the glucose in plant, it is stored in them and used for the liberation of energy
This same stored chemical energy in the giraffe is taken up by the lion.