The size of our brains has increased since we became tools users.
Explanation:
Researches have shown that since we became tool users, the size of our brain has increase significantly. This is an evolutionary footprint in us. Our brain size has not always been the same.
- The earliest humans use very crude tools in their hunting.
- Modern man is full of technology and advanced tools.
- To get here, the brain has constantly been changing over time to accommodate more innovative faculties.
From this excerpt, one can deduce that the commentary is trying to prove Susan wrong by linking how the body part of humans have changed to adapt to the environment.
The second option presents the most logical explanation for this.
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Speciation, the evolutionary process by which new species are formed, is clearly responsible for the ultimate generation of species diversity over geologic time.
Answer:
chemical change
Explanation:
the log is a new substance now
