Answer:
Temperature
Altitude or Elevation
Moisture or water vapour.
Explanation:
C. Dinosaur footprint as it is the only body part that is stated in the choices.
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Answer:
The force of surface tension in the lungs is so great that without something to reduce the surface tension, the airways would collapse after exhalation, making re-inflation during inhalation much more difficult and less effective. Collapse of the lungs is called alectasis.
Explanation:
