Answer: One example of a metaphor in the poem is when Frost compares the birch trees to "wanderers in a the yellow wood." In this metaphor, the trees are compared to travelers moving through a forest.
Explanation: These metaphors can be changed into similes by using the words "like" or "as" to explicitly compare the birch trees and their movements to other things. For example, the first metaphor could be changed to a simile by saying that the birch trees are "like wanderers in a yellow wood," and the second metaphor could be changed to a simile by saying that the movement of the swinging birch trees is "like the arc they take,/ Loaded with ice on a sunny winter morning."