The Geologic Time Scale is divided into huge blocks of time called eras. Eras are defined by major changes in the fossils found in the rock layers that were formed during those time spans.

Pretty ssure the answer re her answer is b hope this : )

It is nonrenuable which means that once you have used it, it's gone forever.

Conflicts arising from drug cartels and goverment corruption is an issue that would most likely be considered as mexico's most challenging problem of today. the correct option among all the options that are given in the question is the third option or option "c". this problem has continued for a very long time.