Answer:
At the pre-school, they teach children to speak politely, walk slowly, and act fairly.
Explanation:
Parallelism is when phrases in a sentence have <u>identical</u> grammatical structure.
Three verbs <em>speak, walk, </em>and<em> act</em> are respectively modified by the adverbs <em>politely, slowly, </em>and<em> fairly</em>. This is correct parallel structure.
The other sentences use adverbs, adjectives, and even a prepositional phrase to modify verbs. Since the grammatical form of these modifiers is <u>different</u>, the sentences do <u>not</u> contain parallel structure.
