Question

why the troposphere is 8 km higher in equator than poles

Answer 1

because they are far from it. .
..
.

.
hope you understand

Answer 2

Fundamentals of atmospheric modeling show that the height of the tropopause depends on the location, notably the latitude, and that the troposphere is roughly 8km higher at the equator than the poles depending on the time of year.

First guess was that the temperature of the would impact its density (for example, here's the data for -50° and 50° c) - though this does not appear to show the cause of why is the troposphere 8km higher at the equator than the poles.

IF IT IS CORRECT MARK BRAINLIEST ✌️