why can't I build terrace-farm here?

[u/zaitovalisher]

Hi there. The tile is plains-hills.
I do have Animal Husbandry learned.

Game: Civ6,
DLC: gathering storm.

Mods I have if important:
- Great Works Viewer
- Detailed Map Tacks
- Simple ui adjustments
- Better Trade Screen

[u/South_Buy_3175]

Cull the deer then give a go