A couple of basic questions about hexsides

[Rob_by_the_river]

Regarding b:
Embankments show very steep elevation changes. Walking up a gently climbing hill is more tiring than flat ground, hence the +1 for Elevation change.
But it is way harder clampering up a very steep section of slope, so extra points get added. Way less of a problem on the way down, but note that Embankments are obstruction hexsides, so will disorder Line Infantry and Cavalry.
Since it is so steep, it can act as an imprompto trench for infantry on the lower side.
Think about the sunken road in the battle of Antietam for example.

By the way, are those modded counters in your screenshot? They look very nice!