Question

use the evidence in the text to select the photosynthetic organism.
the opuntia microdasys cactus gets its green color from chlorophyll. the cactus uses the chlorophyll to capture energy from sunlight. the cactus has yellow spots made of hair - like spines that help protect it.
nembrotha cristata is a sea slug with bright green spots. this sea slug eats jellyfish and takes their stinging cells into its own body. if threatened, the sea slug then shoots out the stinging cells.

Explanation:

Photosynthetic organisms use chlorophyll to capture sunlight energy. The Opuntia microdasys cactus has chlorophyll (key for photosynthesis), while the sea slug (Nembrotha cristata) is an animal that eats jellyfish (no indication of photosynthesis).

Answer:

Opuntia microdasys cactus