Which word formation process is demonstrated by following word: "Google" "ad", "toothpaste", and "brunch" in sequence?

Which word formation process is demonstrated by following word: "Google" "ad", "toothpaste", and "brunch" in sequence?

Explanation
  • Google (Conversion): Originally a noun, "Google" became a verb meaning "to search online."
  • Ad (Clipping): Shortened from "advertisement."
  • Toothpaste (Compounding): Formed by combining "tooth" and "paste."
  • Brunch (Blending): A mix of "breakfast" and "lunch."