Which factor increases as a result of increasing altitude? air pressure, air density, height of sea level or space between gas molecules

space between gas molecules

Explanation:

as the altitude increases the air density decrease because of weaker gravity and these led to more distant of air molecule  and the space between gas is increased

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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