I want to know the answer to the following question:
In what fields has Darwin's theory of evolution become particularly essential?
All the background I'm provided with is that "It makes sense of the geologic record, biogeography, parallels in embryonic development, biological homologies, vestigiality, cladistics, phylogenetics and other fields, with unrivalled explanatory power; it has also become essential to applied sciences such as medicine and agriculture.". Is that enough to answer the question?