Answer:
dom ➡️ avena➡️
ratón➡️serpiente ➡️águila
Cultural differences between Roman Catholics and Byzantine Christians contributed to the Great Schism, when the Eastern Church and the Western Church separated.
You would have to survey the trails and roads. Basically the easiest way to get from point A to point B on an area map using existing trails.
north america, russia and some of europe like finland
by using salinity and temperature of sea water