Charles Darwin concluded that the 13 species of finches on the
Galapagos Islands
E. Were identical to 13
species in northwestern
South America
F. Probably evolved from
one ancestral South
American species
G. Had adapted to the
same food source
H. All migrated to the island
for temperate weather

F, probably evolved from one ancestral South American species.

Explanation:

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which fault and or fold did you find most difficult to diagram