Final answer:
Reverend Parris's primary concern for his daughter in Act I of "The Crucible" is driven by his fear of public opinion, as it could severely impact his reputation and status in the Salem community.
Step-by-step explanation:
From Reverend Parris's comments in Act I of "The Crucible," it can be inferred that his concern for his daughter is primarily based on his fear of public opinion. This is evident from the historical context surrounding the witch trials in Salem, where a tarnished reputation could have severe social and personal consequences. Parris's apprehension is rooted in the potential damage to his standing within the community, given the Puritan belief system that viewed the devil's work as responsible for societal misdoings, and any association with witchcraft could spell disaster for his career and social status.