Prosopopoeia

Of the prosopopœia or personification, there are two kinds: one when action and character are attributed to fictitious, irrational, or even inanimate objects; the others, when a probable but fictitious speech is assigned to a real character.

Prosopopœia a new person feigns, And to inanimates speech and actions deigns.

Hence the frequency and beauty of the prosopopoeia in poetry, where trees, mountains, and streams are personified, and the inanimate parts of nature acquire sentiment and passion.