Answer:
Mass
Explanation:
The larger a star's mass, the shorter it's lifespan.
I hope this helps! ☺
Answer:
The cilia is one of the things that act defensively in the respiratory system.
Explanation:
It propels a mucus-like liquid that covers the airway which traps pathogens (potentially infectious microorganisms) and other particles, preventing them from reaching the lungs.
And if and because or up down and below or above or beneath
