I think its soluble fiber will be the answer
A <u>pneumotachometer</u> actually measures <u>Air</u><u> </u><u>flow</u><u> </u>by sensing the <u>pressure</u> on ethier side of a fine mesh screen.
so, correct option is :
=》O Air Flow: Pressure
Answer: Yes becuase white cells help in fighting against diseases, infections, allergies and foreign particles. Just like soldiers would help in fighting off enemies. These white cells keep our body safe and healthy, like soldiers keep their own country safe.
Hope this helped you!