Answer:
Anabolic.
Step-by-step explanation:
Metabolism may be defined as the breaking and the formation of molecules inside the living organism. These reactions are important for the cell survival. Two main types of metabolic reactions are catabolic reaction and anabolic reaction.
The anabolic reactions may be defined as the reaction in which small substance combine together to form a large product. Here, small molecule like water and carbon dioxide combine together to form a complex molecule glucose. Hence, this is anabolic reaction.
Thus, the correct answer is option (B).