health, food, sleep, breathing, water, sex, homeostasis, excretion
Level 1 is about having a roof overyour head and clothes enough to not be ill all the time. You need to be healthy to work and to live.
Take care of your body’s inputs and outputs, rest, oxygen, happy times, etc.
Get and maintain a stable condition of your body.
Be healthy, at your ideal weight, in top shape, exercise, eat right, get sex, healthy excretion.