Desert island

Knife
Water Flask
A fishing net
Matches
Tent

I would chose a knife to gut the fish or food and also cut through bushes, if its a island.
I would chose a water flask so I can drink and fill it up.
I would chose a fishing net because I could fish for food in the water.
I would chose matches so I could start a fire to keep warm and cook the fish.
I would chose a tent so I could stay warm and also away from mosquitos and bugs.
I would chose a hammock if I could and a survival magazine if I could.