Please help. There is a lot going on with this model of the carbon cycle, so spend some time reading and thinking about each label and arrow.

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.

I'm soooo sorry but i can't answer but you can ask another professor

The correct answer:   [c]:   "cell phone call" .