Answer:The correct answer is A) axoneme.Axoneme is the core structure of cilia and flagella in eukaryotic cells, composed of:1. Microtubules (9+2 arrangement)2. Associated proteins (dynein, nexin, and others)It provides:1. Structural support2. Motility (movement)3. Sensory functionsThe other options are incorrect because:B) Sarcomere: functional unit of skeletal muscle contractionC) Myofibril: component of muscle fibersOther related terms:- Centriole: structure involved in cilia/flagella formation- Basal body: structure at the base of cilia/flagella- Cilium/flagellum: appendages for movement, sensing, or signaling[tex].[/tex]