Answer:
b. biomass
Explanation:
Corn is an example of biomass type of energy. Biomass is energy generated from living or once living organisms. 
Corn is a plant and it is categorized as a living thing. 
- Most biomass are sources from plant materials. 
- When they are burnt, the chemical energy within them is liberated and heat energy is usually produced. 
- The energy derived can be used for a number of purposes by transforming them.