Answer:
A. by using eyespots and flagella
Explanation:
The Euglena identifies a light source and move toward it so photosynthesis can occur "by using eyespots and flagella"
When euglena undergoes photosynthesis, it detect light through its eyespot and move toward it. This process is known as phototaxis. It uses its flagella to move toward the light. The flagella is a long whip-like structure which is used by the euglena to move.
The Euglena is both a heterotrophic and an autotrophic organism. The euglena has chloroplasts which trap sunlight that is used for photosynthesis.
