Deer declined drastically after their habitat was flooded after frantic efforts over three decades by the forest authorities to revive the dwindling population, it did bounce back now the dear population is as huge as it was three decades ago

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures