At the same time, D&D freely misuses terms like "shaman", "nature spirit", "animism", Druid, etcetera.
Also, consider the chwanga. It is an Elemental creature type, but is part of the nature of the Material Plane. This concept is closer to animism.
But in animism. The natural feature itself is the person. In Norse animism, the mind of one mountain can project out of the mountain, to manifest in the physical body of a human, to travel to an other land, to become one of the mountains there. So, like a human can travel outofbody, so can a mountain. There is room for a kind of "psionic spirit", a mindful presence. But animism is all about the physical objects: body, mountain, river, sunlight, etcetera.