Answer: The spicules have several functions which helped sponges survive their environment. Some of them includ:
Explanation: Spicukes provide structural support to sponges, giving them shape and rigidity. This helps sponges to maintain their shape and withstand currents and external pressures.
Spicules act as a defence mechanism. The sharpness and hardness of spicules make them an effective deterrent against grazing.
Spicules aid in the water filtration process.