Survival is the skill used to stay alive in environments disconnected from easy food, clean water or readily available shelter. It is also the skill used to navigate difficult terrain, avoid getting lost and mitigate environmental hazards.
Overcome:
Survival can be used to overcome any situation related to being in a place disconnected from the infrastructure of civilized life – whatever that happens to be in the area. This might be getting around hostile wildlife, finding water in the desert or constructing a shelter ahead of an incoming storm. .
Create an Advantage:
Creating an advantage with a wilderness environment is the purview of Survival, whether that’s making hunting easier by finding a prime watering hole or building/finding shelter.
Attack:
Survival is not used to attack.
Defend:
Survival can be used to mitigate weather or environmental conditions.