Concept:Chlorophyll is the green pigment used for photosynthesis, and it is found only in photosynthetic cells.
Explanation:Chlorophyll is a green pigment present inside chloroplasts.
Among the given options, Euglena is a single-celled organism that contains chloroplasts in its cells.
These chloroplasts hold the chlorophyll needed to absorb sunlight and make food.
Euglena can thus make its own food through photosynthesis when light is available.
A caterpillar and a grasshopper are animals, so their cells do not contain chlorophyll.
Paramecium is a protozoan that also lacks chlorophyll and chloroplasts.
Therefore, only Euglena has chlorophyll in its cells.
Answer:Option C — Euglena