Concept:Chloroplasts are organelles that contain chlorophyll and are specialized for photosynthesis.
Explanation:Euglena viridis has chloroplasts, which are typically found in plants.
These chloroplasts contain chlorophyll, the green pigment that traps light energy.
Using light energy, Euglena manufactures its own food from carbon dioxide and water.
This process is called photosynthesis.
Thus, the presence of chloroplasts enables Euglena to carry out photosynthesis.
Answer:B. Carry out photosynthesis