Foraging is a Survival Challenge activity. Its more opportunistic than active Hunting, and relies primarily on smaller game, fish, and insects easily trapped, and what vegetables, fruits, tubers or similar plants to survive. The capital application accumulates sustenance on a larger scale for future use. This typically leads to farming and animal husbandry and employs more powerful technology and processes as it scales up. Foraging most often involves simple rote processes and equipment – it implies no deep understanding of Botany or Zoology for habitats, equipment, processes, etc. It is usually related to a Background trade or profession (ex: The Sailor Background can forage, mostly for fish using basic tackle).
Collection is a large effort to forage and gain multiple days of sustenance using tools designed for the targeted game and environment. It is most often done in coordinated groups.
Subsistence is mainly done with primitive tools and means, and/or in order to do little impact on the habitat (leaving little trace). It is taking only what is needed in the moment – bare maintenance of health for necessity. It is most often done singularly.