>>929393Three items to satisfy food, water, shelter, and warmth?
I'd have to assume that any island that wouldn't already have an existing population, likely also wouldn't have a fresh water source, and you can't filter salt out of seawater. I'd want a pot with a lid that can be inverted to distill seawater, and a container to place inside it to catch the fresh water, subsequently concentrating salt to use for brining and salting any surplus meats. So my first two items would both be stainless steel pots. That leaves food, shelter and warmth and only one item to procure all three with. I suppose that would have to be a large handsaw; high-carbon steel can be struck to produce fire, as well as being used to procure firewood and shelter materials, plus I could snap a small section off the tip to make a knife. Food would likely end up being small mammals until I could set up a tidal fish trap, but with both a saw and a knife, spring traps should suffice.
