Final answer:
The types of coal can be ordered from lowest to highest carbon % as lignite coal, subbituminous coal, bituminous coal, and anthracite coal.
Step-by-step explanation:
The types of coal can be ordered in terms of increasing carbon % as follows:
Lignite coal - It has the lowest carbon % among the four types of coal.
Subbituminous coal - It has a higher carbon % than lignite but lower than bituminous coal.
Bituminous coal - It has a higher carbon % than subbituminous coal but lower than anthracite coal.
Anthracite coal - It has the highest carbon % among the four types of coal.