Index fossils found in rocks can be used to help determine the rock's age, because index fossils are fossils of species that .
a changed their diets
b hid in marine sediments
c migrated to different environments
d quickly became extinct

Early in the story when tom finds an indian skull in the woods which he kicks in temper. the devil then makes his appearance and, as tom surveys him, he notices that the devil is neither "negro" nor "indian." in fact, he has a "swarthy" complexion and is "begrimed with soot."

Npnegytthbduhhgvmone

Ithink that it’s mali

Answertropical depression;