60 explain why the fossils in rock layer a are more likely to resemble life-forms that exist today.61 state one conclusion that many scientists have made about earth's past by studying fossils

60. They resemble life-forms that exist today because they are the most recent forms of life, they are the most close ancestors of the modern forms of life while the other died millions of years ago.
61. [by guessing] Scientists conclude that in the past, life-forms died due to changing environments while the organisms with adaptations survived and are relatively still present, although they've evolved.