The three different skeletal designs that give a body its shape are:
Hydrostatic skeleton-contraction of muscles occur for changing cooler, due to which movement is caused.
Exoskeleton-external skeleton composed of calcium carbonate and chitin
Endoskeleton-body's internal system made of hard mineralised components.
Answer:
As of plants, bioluminescent algae fix carbon dioxide in the presence of sunlight and release oxygen. Further, during this process, they produce light as a part of photosynthesis products. Therefore, the use of bioluminescent algae can reduce anthropogenic carbon dioxide from the environment.
Bioluminescent algae-based lamps are being prepared by scientists to overcome these environmental concerns. Furthermore, these lamps would be used as street lights and reduce energy demands as well (burning of fossil fuels).