Answer:
Lactic acid
Explanation: After exercise, lactic acid is produced from anaerobic respiration. This burns your muscles.
Answer:
1: Knowing how to find and purify water. Once you've depleted the supply you brought with you, finding water and making it safe to drink will be your number one priority.
2: Protecting yourself from the elements.
3: Navigation.
4: First aid.
5: Lighting a fire.
hope it helps
Drink plenty of water yep that should help
