Comparative anatomy: It is the study of determining the differences and similarities in the structural anatomy of different species. It helps in determining the phylogenetic relationship among the primitive and modern organisms. Thus the evidences obtain from such studies can be used to determine the age of earth.
Fossil evidence: The fossil is trace evidence of dead animals or plants that are preserved under the sedimentary rocks. The evidences of traces can be looked for evolutionary development. This development can be compared with the history of the earth.
Molecular clocks: The average rate at which the genome of the species accumulates the mutations that can be used to examine the divergence of evolution. The rate of evolution can be examined to know how old the species was hence, it will help in determining the age of Earth.
Biological evidence of the age of the earth includes fossil evidence, comparative anatomy and molecular clocks. The correct options among all the options that are given in the question are the second, third and fourth options. I hope that the answer has come to your help.
