Final answer:
Erasmus Darwin's integrative approach, which included a wide range of subjects and observations of natural phenomena, has become a foundation for the field of Evolutionary Biology. This kind of holistic observation and interpretation of biology was further developed by his grandson Charles Darwin in his theory of evolution by natural selection.
Step-by-step explanation:
The 'integrative' approach used by Erasmus Darwin involves a broad synthesis of various fields of knowledge, including paleontology, biogeography, and anatomy. The approach was characterized by a comprehensive examination of natural phenomena, which included the study of both domestic animals and wildlife behaviours. This holistic way of observing and interpreting the biological world has become fundamental to the field of Evolutionary Biology. Charles Darwin, his grandson, built upon these foundational ideas when he proposed his theory of evolution by natural selection.
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