Answer:
personification and imagery
Answer:

Explanation:
9 x 9 x 9 x 9 is 9 multiplied by itself four times, so it's 9 to the 4th power as typed above.
Answer:
"the strongbox is still safely hidden beneath a hollow stair. They’re alive, and the house is still standing. "
"when Mattie hangs Grandfather’s sword, there’s a sense that his role as protector of the house is being transferred to her."