Why is the equator generally warmer than the poles?

Why does a coastal area experience less variation in temperature compared to a non-coastal area?

Why is it generally warmer at the $\mathrm{equator}$ than at the $\mathrm{poles}$?

Why is it generally warmer at the $\mathrm{equator}$ than at the $\mathrm{poles}$?

Why is it generally warmer at the $\mathrm{equator}$ compared to the $\mathrm{poles}$?

Which region on Earth receives the most solar radiation per unit area over a year?$J/m^2 per year$

How does altitude affect temperature in different latitudes?

Why is the equator generally hotter than the poles?