To solve this problem, we need to identify the components required for the dark reaction of photosynthesis, also known as the Calvin cycle.$\newline$The dark reaction does not require light directly, but it depends on the products of the light reaction. Let's analyze each option:$\newline \bullet$A. Light:$\newline$ - The dark reaction does not require light directly. It occurs in the stroma of chloroplasts and uses the products of the light reaction.$\newline \bullet$B. Chlorophyll:$\newline$ - Chlorophyll is essential for capturing light energy during the light reaction, not directly for the dark reaction.$\newline \bullet$C. CO₂:$\newline$ - Carbon dioxide is a key substrate for the Calvin cycle, where it is fixed into organic molecules.$\newline \bullet$D. ATP:$\newline$ - ATP is produced during the light reaction and is used as an energy source in the Calvin cycle.$\newline \bullet$E. NADPH:$\newline$ - NADPH is also produced during the light reaction and provides reducing power for the Calvin cycle.$\newline$Based on this analysis, the components required for the dark reaction are CO₂, ATP, and NADPH.$\newline$Therefore, the correct option is:$\newline$Option 1: C, D and E only.