Because it does not directly affect the landform thus why it's considered as a passive agent. Those that do directly affect landforms are tectonic activities, winds, and water flow. Weather only onsets the formations.
Answer:
I think it might be B......
Nigeria is a country in West Africa.
Animism is close relation to polytheism, because of their belief in multiple spirits of the water, tree, mountain etc, like many traditional African beliefs and Shinto.