HELP PLEASE HELP

Free 10 points can u subscribe to me tonixwilson (running out of points lol)

Aman lives on the twelfth floor of an apartment building. every morning he takes the elevator down to the lobby and leaves the building. in the evening, he gets into the elevator, and, if there is someone else in the elevator -- or if it was raining that day -- he goes back to his floor directly. otherwise, he goes to the tenth floor and walks up two flights of stairs to his apartment.

Which two pieces of evidence support the idea that coal is underutilized? this was on study island about coal