Question

guided practice
in the formation of coal, which stage has the lowest carbon content?
a. lignite
b. anthracite
c. peat
d. bituminous coal

Explanation:

Coal formation proceeds from peat (the earliest, least compressed stage) to lignite, bituminous coal, then anthracite. Peat has the lowest carbon content (around 60% or less), while later stages have progressively higher carbon concentrations, with anthracite having the highest (over 86%).

Answer:

C. peat