Final answer:
Zero is the one who sneaks into the camp for food and water because Stanley is too weak from digging holes.
Step-by-step explanation:
In the novel 'Holes' by Louis Sachar, Zero is the one who sneaks into the camp for food and water because Stanley is too weak from digging holes. Stanley is assigned the task of digging holes as a punishment at Camp Green Lake. Due to the physical toll of digging holes all day, he becomes weak and unable to go to the camp for supplies. Zero, on the other hand, is not assigned to dig holes and therefore has more energy and strength to sneak into the camp.