X is the independent variable, and the domain, and y is the dependent variable, and the range.
The biggest portion of Earth's land mass is occupied by the temperate climate region. This the climate region that lays between the polar-sub polar climate region, and the tropical region. This is the region where we have season changes throughout the year, and also the biggest portion of the human population is settled in this climate region.
Because there hard to climb up it and makes our muscles exhausted