Enzyme Catalyzing a Key Glycolytic Step

In the human body, metabolic pathways regulate the conversion of nutrients into energy. One of the key metabolic pathways is glycolysis, which breaks down glucose to produce ATP. During glycolysis, glucose is phosphorylated and undergoes a series of enzymatic reactions.

Which of the following enzymes is responsible for catalyzing the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, a key regulatory step in the glycolytic pathway?