Question

Which of these best matches a source of information with its most reliable use?

root structures → comparison of the evolution of land animals

root structures → comparison of the evolution of plant eating organisms

fossil records → comparison of the evolution of frogs and birds

fossil records → comparison of the evolution of completely soft-bodied organisms

Answer 1

the last one is incorrect because the soft-bodied organisms, usually decompose without leaving much remains
the first one is incorrect because obviously you don't find roots in animals. and as for the third,the evolution of plant eating organisms aka herbivores can't be determined from roots.
so i hope you can figure out the last sensible option

Answer 2

thanks