This is the 4347th most frequent Russian word.
богата
"Богата" means "rich" or "wealthy" in feminine form in Russian.
Here, 'богата' describes the imaginative richness, linked as a predicate to the subject 'fantasy'.
У него богата фантазия.
He has a rich imagination.
Here, 'богата' describes Russia's abundance in natural resources, functioning as a predicate adjective.
Россия богата природными ресурсами.
Russia is rich in natural resources.
In this sentence, 'богата' indicates the richness of the speech in terms of content, serving as an attribute.