研究等级
| Level | Unlocks |
|---|---|
| Level 1 | Thriving Requirement 1: Long Grass terrain; Przewalski's Horse Fact Sheet |
| Level 2 | Thriving Requirement 2: Sand terrain; Fertility Level 1 (+15% fertility) |
| Level 3 | Thriving Requirement 3: Food Grade 2; Release groups and release to the wild |
| Level 4 | Thriving Requirement 4: Grazing Ball Feeder, at least 3 |
| Level 5 | Thriving Requirement 5: at least 12 objects or plants with the Grass tag; Fertility Level 2 (+30% fertility) |
