Identifying and correcting an error in sentence construction in the given sentences.
The sentence containing an error in its construction that needs revision is sentence 1. The issue lies in the lack of a clear subject in the sentence. The clause 'Walking dogs, cleaning kennels, hand-feeding newborn kittens, and supporting the adoption process' is a participial phrase, and it is not connected to a clear subject, making the sentence structurally incorrect.
In contrast, sentence 2 presents a clear subject ('Working at the animal shelter') and is grammatically correct. Sentence 3 also maintains subject-verb agreement and clarity. Similarly, sentence 4 is well-constructed and does not contain errors in its construction.
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