How are proteins associated with glycolysis?

See below  

Step-by-step explanation:

All the enzymes used in the glycolysis reactions are proteins.

The body can use proteins as alternate sources of energy, but they are involved only in the Tricarboxylic Acid Cycle and the reactions linking  glycolysis to the cycle, and these occur after glycolysis.

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.