What are the three basic needs of primitive people are?

Answer 1

The three things you'll need are (1) Water for Drinking and Sanitation; (2) a Shelter from the elements; and (3) a viable food source.

Fire is a great invention as was the wheel, edged weapons, and guns. You can live without fire, a knife and a rifle/gun in the Outback or Desert, however, I wouldn't enjoy it. After Water, Food, and Shelter, comes a good Knife. (And if you're thinking you need fire to kill the germs in water, yeah, that's one way, so is iodine but you can use the Sun, a t-shirt, and let it drip through to a Canister to clean water for drinking and sanitation.)

To stay alive you have to drink water and eat and you need at least a basic kind of shelter to warm yourself and stay out of the elements, even in the snow you can dig a hole and live in the hole while a snowstorm rages overhead--you'll be warm, you can drink the snow, and even make and keep going a fire, however, fire in a snowstorm isn't going to be around for very long. The fourth thing, were there to be four, would be fire of course, it's a great way to make sure you're drinking water without getting sick, can make a meal a lot better than it would have been by cooking it, and within the shelter, a good heath makes the cold ground a lot warmer and comfortable. Also, you can clean a wound with fire and boiled wine for an infection from skin rot or to cauterize a wound taken from a battle or from a hunt for food.