Final answer:
Hester worries about Pearl's quirks because they unsettle the puritanical society and may affect Pearl's acceptance and future.
Step-by-step explanation:
Hester's concern about Pearl and her quirks stems from the unusual behaviors that Pearl exhibits, which may be perceived as a reflection of the sin represented by her birth and her mother's scarlet letter.
Pearl's actions and characteristics often unsettle the puritanical society around her, leading Hester to worry about Pearl's acceptance and future in such a community.
The intense scrutiny and judgement faced by Hester for her transgressions are projected onto Pearl, making Pearl's perceived eccentricities further cause for concern.