Why are daphnia multicellular?

Daphnia, commonly known as water fleas, are multicellular organisms because they are composed of multiple cells that work together to perform various functions necessary for survival. This multicellularity allows for specialization of cells, enabling complex structures and systems, such as a nervous system, digestive tract, and reproductive organs. These adaptations enhance their ability to respond to environmental changes and carry out essential life processes efficiently. Additionally, being multicellular allows for greater size and complexity compared to unicellular organisms.