You can get the common cold repeatedly mark all that apply
1. Sometimes colds are very strong.
2. your excretory system is malfunctioning.
3. All illnesses repeatedly make you sick.
4. Your wbc( white blood cells) may not recognize the antigen shape.
5. The antigen shape mutates.

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.

Digestion because it removes waste

It's either -limiting factors or -scarce resources but i'd go with my first answer since the food and water are abundant they really aren't scarce