Wait what I can answer this by saying eerily means scary but I really don’t know. You can comment if you made a typo.
A dependent clause cannot stand alone : An independent clauses expresses a thought on its own
I think Mary and Colin´s transformation is gradual. Mary and Colin both become different people. Mary grows up and is less spoiled, and Colin outgrows his mean ways when he goes outside and sees the secret garden realizing he wasn´t injured as previously thought. As for evidence I am currently re-reading the book now.
Answer:
"He stops at a barbershop. His hair is curly and far too long. It is an easy tip-off. People here tend to have straighter hair."
Explanation:
The above excerpt shows how difficult it was to interact with the local population in Oaxaca, especially when an individual, like Enrique, was very different from the natives and seemed to have an exotic experience for them, which highlighted him and did not allow him to fit in. Knowing this and needing to interact and fit in with the population, Enrique, through his intelligence and resourcefulness, realized that it would be positive if he cut his big curly hair, to look more like the local population and to be so out of place among the natives, who used to have straight and shorter hair.