Question

why on the earth, the atmospheric pressure is maximum at the sea level?

Answer 1

The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels. For example, there are fewer molecules above the 50 km surface than are found above the 12 km surface, which is why the pressure is less at 50 km

Answer 2

wieght force of air is maximum at sea level .
we also know P=F/A.
And F used here is the atmosphere force.
all atmosphere air wieght acts at sea level.