Science Homework Help

This is from my class

Earth Science 17 ( ESS 17 ) Catastrophes! need some help please

Question 111 ptsWhich of the following parts of the 3 – cellconceptual model can explain the presence ofdeserts at about 20 – 30 ON and 20 – 305 ?- polar high where air sinks from the upper atmospherecompresses and so warms , resulting in clear skies andlow humidityintertropical convergence zone ( IT CZ ) where surfacewinds converge and air rises- subtropical highs where air sinks from the upperatmosphere , compresses and so warms , resulting inclear skies and low humidity