The answer to your question is,
C. Muscular fitness training strengthens tendons, ligaments, and cartilage.
-Mabel <3
Respiratory defense system.
The answer you're looking for is olestra
Answer:
Cilia which are hairs inside the respiratory system are like air filters. Mucus, however, traps smaller particles like pollen and smoke.
Explanation:
The cilia provides movement to the mucus so it can be expectorated and traps dirt inhaled in the air.
hope this helps :)