D. a biological process that is a reaction of photosynthesis in which energy from ATP and NADPH is used to make sugars

Answer 1

The process you are describing is known as the Calvin cycle (also called the light-independent reactions or dark reactions) of photosynthesis. In the Calvin cycle, carbon dioxide (CO2) is captured and, using energy from ATP and NADPH (produced in the light-dependent reactions), is converted into glucose and other sugars. This cycle takes place in the stroma of chloroplasts and is crucial for the conversion of inorganic carbon into organic molecules that serve as energy sources for the plant and other organisms.