The horses and the superior weapons
Crimes against humanity refer to specific crimes committed in the context of a large-scale attack targeting civilians, regardless of their nationality. These crimes include murder, torture, sexual violence, enslavement, persecution, enforced disappearance, etc.
Suzie's explanation is correct because magma flows through cracks between faults and this can result in the creation of volcanoes. Johnny's statement causes trenches which could lead to magma flow but not volcanoes.
