The eukaryotic cell is composed of a network of protein fibres that is known as the cytoskeleton. It is responsible for the movement of organelles around the cytoplasm (organelles are attached to the cytoskeleton). This network of proteins consists of protein microfilaments, intermediate filaments, and microtubules. Microfilaments (actin filaments) are the filaments that are made up of actin protein. The microtubule is a tubular linear polymer of tubulin protein.
So, the correct answer is 'Proteinaceous filaments'.