Lunar phases are caused by the geometry of the Sun, Earth, and Moon, and that geometry is independent of whether you are viewing from the northern or southern hemisphere.
(Lunar phases; are caused; by the geometry of the Sun, Earth, and Moon) (that geometry; is; independent of whether you are viewing from the northern or southern hemisphere) (you; are viewing; from the northern or southern hemisphere)
Lunar phases that geometry you
are caused is are viewing
by the geometry of the Sun, Earth, and Moon
independent of whether you are viewing from the northern or southern hemisphere
from the northern or southern hemisphere