What's the most important survival tool for a novice in a jungle scenario?

• machete
  You could make an argument for the machete, but a novice survivalist would do well to stay hydrated with a water filter.
• water filter
  You could make an argument for the machete, but a novice survivalist would do well to stay hydrated with a water filter.
• fire starter
  You could make an argument for the machete, but a novice survivalist would do well to stay hydrated with a water filter.