Question

which of these is the best example of wedging something? using an automatic sprinkler system to water a garden dropping a ceramic bowl and watching it crack into pieces shoving a thin board under a doorframe to keep the door open pounding piano keys violently to convey strong emotion

Explanation:

Wedging involves inserting something (like a thin board) to keep something in place or create a separation. Shoving a thin board under a doorframe to keep the door open fits this concept. Using an automatic sprinkler is about watering, dropping a bowl is about breaking, and pounding piano keys is about music - none are related to the act of wedging.

Answer:

shoving a thin board under a doorframe to keep the door open