How would you construct a sentence using "both... and" for the words "He is kind. He is helpful."?

The construction "both... and" is specifically used to emphasize the inclusion of two attributes or qualities at the same time. In the choice "He is both kind and helpful," it effectively combines the two qualities into a singular, impactful statement. This structure clearly indicates that the person possesses both attributes simultaneously, highlighting their kindness and helpfulness without ambiguity.

The other choices, while related, do not utilize the "both... and" structure, nor do they convey the same emphasis. The phrase "as well as" in one option introduces a different nuance, while "and... too" is more casual and less formal than the preferred construction. The last option negates both attributes entirely, which is contrary to the intent of the original sentences. Thus, the selected answer satisfies the requirement of using "both... and" correctly and meaningfully.