Question

1. in the process of coal formation, the first form of true coal is called ____.

○ anthracite
○ bituminous coal
○ lignite
○ peat

Explanation:

Coal formation proceeds in stages: peat is a precursor, not true coal. Lignite is the first stage of true coal, followed by bituminous coal and anthracite (the highest rank).

Answer:

○ lignite