In animals, an important function of enzymes is to help digest food. Digestive enzymes speed up reactions that break down large molecules of carbohydrates, proteins, and fats into smaller molecules the body can use... hope this helps
The green sample possibly contains algae or some other sort of bacteria
The answer is false (sorry I'm late.)
By storing food in the proper temperature (room temperature or fridge/ freezer) and cooking foods (such as meat) properly and fully.