"The birds are chirping as if they were quarrelling." Is this sentence a metaphor or personification? Why?

Personification, because quarreling is an act that only people can have.

Metaphor: Metaphor compares one thing with another according to the similarity between things. There must be similarities between ontology and carrier.

Personification: to personify things, and to turn things without human actions and feelings into things with human actions and feelings.