Clearing the wilderness in early spring was a strenuous task. However, the survivors were doing it with gusto due to the coercion of Peace Party's policies and the prospect of unearthing valuable finds during the process, just like this particular survivor.
Unlike animals, which become zombies or evolve, it was typically harder to identify plant evolution unless the plant had evolved peculiarly. Hoping to obtain their Evolution Crystal Core or Evolution Crystal purely relied upon luck.
You might dig up a large clump of vegetation without discovering a shred of an Evolution Crystal Core, or by chance, obtain these resources from a handful of wild grass.
After digging up some Evolution Crystal Cores and Evolution Crystals, you could exchange them for food at the designated hut.
Those tasks which carried the chance of striking a profitable find were the most exhilarating. Many survivors shared this lottery-like hopeful mindset, hence their growing enthusiasm.