It allows us to determine not only how and why organisms have become the way they are, but also what processes are currently acting to modify or change them !
They took different paths to discover energy, but both found that energy can be exerted, and conserved
Sun provides energy to plants, which use it to make food from soil nutrients, which is eaten by animal, which is eaten by another animal, that produces waste and die, that decomposes and adds nutrients to the soil, which plants use with sunlight to make food from soil
