The tone of the passage can best be described as:

Concept

A passage's tone is the writer's attitude toward the subject, inferred from diction, emphasis, and the movement of ideas. Tone is identified from the passage as a whole, not from a single isolated word.

Reflective language signals considered judgment, while warnings about consequences create a cautionary stance.

Application

The passage first reflects on the ecological meaning of festivals, then examines pollution, waste, and excessive consumption. Its closing condition—that celebration must be joined with sustainability—combines reflection with a warning about continuity.

Contrast

• Detached and neutral suits impersonal reporting, whereas the passage openly evaluates harmful practices and urges responsibility.

• Casual and humorous would require playful or comic language, which the passage does not use.

• Aggressive and accusatory would directly blame a target in hostile language; the passage criticizes practices but remains measured and constructive.

• Thoughtful and cautionary captures both the reflection on meaning and the warning about unsustainable celebration.

Therefore, the passage's tone is thoughtful and cautionary.