Question

which sentence uses the underlined word correctly?

the principle visited our class today.
our constitution is based on certain principles.
our experiment was based on scientific principals.
the principals of my parents have always stuck with me.

Explanation:

Define the homophones "principle" and "principal"

"Principle" is a noun meaning a fundamental truth, law, rule, or doctrine. "Principal" can be a noun meaning a person in a leading position (like a school head) or an adjective meaning main or primary.

Analyze each sentence option

• "The principle visited our class today." (Incorrect: refers to a school head, which should be "principal".)
• "Our Constitution is based on certain principles." (Correct: refers to fundamental laws or rules.)
• "Our experiment was based on scientific principals." (Incorrect: refers to scientific laws, which should be "principles".)
• "The principals of my parents have always stuck with me." (Incorrect: refers to moral rules or beliefs, which should be "principles".)

Identify the correct choice

The second option uses the word "principles" correctly to mean fundamental doctrines or rules.

Answer:

• The principle visited our class today.
• Our Constitution is based on certain principles. (Correct answer)
• Our experiment was based on scientific principals.
• The principals of my parents have always stuck with me.