Answer:
The correct answer is b) they are capable of photosynthesis.
Step-by-step explanation:
Euglenas are a group of flagellated protists commonly found in fresh water. As you can see from the picture, one of the organelles found in the cytoplasm is chloroplast and this organelle is directly involved in photosynthesis process. So, as Euglena has chloroplast the correct option must be that they are capable of photosynthesis.