My apple tree will never get across.The figure of speech used here is
A. Personification
B. Metaphor
C. Simile
D. Synecdoche

Solution :-

The figure of speech used here is 'Personification'.

This is an excerpt from 'Mending wall' written by Robert Frost. Personification is the description of something innate or not human as if it were a person. The apple tree is an example of personification, which may actually be compared to animals.

My apple trees will never get across 

And eat the cones under his pines, I tell him.

He only says, 'Good fence make good fences make good neighbors.'

The apple trees are not actually able to move, and of course that is speaker's point. The speaker does not want a fence. 

So, option (A) is correct.