Coal is used for generating heat by burning, and coal forms from dead plants, compacted. Given these facts, what is used for generating heat by burning among the following options:
- compacted dead plants
 - basic building blocks of life
 - deoxyribonucleic acid
 - igniting fuel and oxidiser
 - hard plastics
 - soft styrofoam
 - Sulfur dioxide
 - thin metal sheets


 

 compacted dead plants        