What are some of the idioms in the yearling book?

"Jody was frozen." This is a dead metaphor, or a metaphor that has become a cliche in speech Jody is not literately frozen, just not moving. See?

"The sink-hole was set in the arid scrub, at the core of the pine island, like a lush green heart." Although this contains "like" it is still considered a metaphor (...says my English teacher)