The following cells perform digestion in sponges:
Choanocytes followed by amoebocytes
Amoebocytes followed by pinacocytes
Pinacocytes followed by choanocytes
Archaeocytes followed by nurse cells
In sponges, digestion is primarily performed by choanocytes and amoebocytes. Choanocytes, are also known as the collar cells. Choanocutes have flagella that create water currents and trap food particles. They play a role in capturing and ingesting food particles. Amoebocytes, on the other hand, are mobile cells that transport and distribute nutrients throughout the sponge's body. They also participate in intracellular digestion, breaking down food particles further. Therefore, option 1 is the correct answer.