Rifle/ammunition
Metal Match
Camping Stove
First Aid Kit
The answers:
1. Rifle/Ammunition - both effective at killing zombies and hunting for food, and it works great from a distance.
2. Metal Match - this can be used anywhere, anytime to light a fire. It is necessary for survival because it provides warmth and cooks food.
3. First Aid Kit - if you're wounded, you won't be able to move away from or fight against the undead. Make sure you have a way to keep yourself healthy and protected.
4. Camping Stove - while it's a great way to cook food, it normally requires some kind of fuel source to work. If you don't have that, you just have a hunk of metal that is cumbersome to carry.
