This is the 5346th most frequent Russian word.
отзывается
"Отзывается" means "responds" or "echoes" in English.
Here, "отзывается" is used to mean 'she speaks about someone,' describing her manner or tone when mentioning him.
Она отзывается о нем только положительно.
She speaks of him only positively.
In this sentence, "отзывается" is used to describe a response or a return, specifically the echo effect in the mountains.
Горы всегда отзываются эхо его голоса.
The mountains always echo his voice.
Here, "отзывается" denotes a reaction or response to requests, showing an action based on someone's appeal.