The type of nutrition shown by Spirogyra is holophytic.
Holophytic nutrition is a type of nutrition in which an organism produces its food by photosynthesis. Spirogyra is a green algae that contains chloroplasts, which carry out photosynthesis. It absorbs carbon dioxide from the atmosphere and uses sunlight to convert it into glucose, which is stored as starch. Therefore, Spirogyra uses holophytic nutrition.