熊

How it works

は (topic) raises 熊(くま) (bear) as the topic — “as for the bear…”. に (to) points to the goal of the motion, the 木(き) (tree) being climbed. The verb is the potential form 登れる(のぼれる) (can climb), built from 登る(のぼる) (climb), which says the bear is able to climb. It stays plain, with no polite ending.