Question

why do schools most likely hold evacuation drills?

Answer 1

Hello, Aubrie11! I hope I can help you with your question.   
    Schools hold evacuation drills because they want students and staff to be prepared in the event of a fire, flood, earthquake, shooting, etc. It's very important for schools so that everyone can exit safely and not be injured. I hoped that answered your question!

From Allikat74 :)

Answer 2

Schools hold evacuation drills because in the old days when there was a fire at their school, the children did not know how to evacuate and many lives were lost. 
Hope this helped!