Which area of development is affected by the cortical thickening in the temporal and frontal lobe areas of the brain during middle childhood

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

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not only is it colder, it also becomes darker, less salty, and more dense.