What type of language is characterized by using pleasant language to avoid harsh truths?

The correct answer is euphemism, which refers to the use of mild or pleasant language in place of direct or harsh expressions. Euphemisms help soften the impact of difficult or uncomfortable truths, making them more palatable for the audience. For example, saying "passed away" instead of "died" is a common euphemism that alleviates the starkness of death.

In contrast, cliché refers to an overused phrase or idea that has lost its originality and impact. Hyperbole involves exaggerated statements that aren’t meant to be taken literally, often for emphasis or effect. Alliteration is a stylistic device characterized by the repetition of the initial consonant sounds in closely placed words, typically used for poetic or rhythmic effect. None of these options align with the concept of using pleasant language to describe harsh realities, as euphemism does.