DESERTIFICATION IS THE SPREAD OF DESERT AREA, AND IF PEOPLE WANT TO LIMIT THE EFFECT OF IT, SOME WAYS ARE TO STOP CUTTING DOWN TREES. DEFORESTATION IS A PART OF THE REASON THAT DESERTIFICATION TAKES PLACE. ANOTHER WAY,IS FOR PEOPLE TO STOP OVERGRAZING AND SLASH AND BURN.
(HOPE THIS HELPS)
I'm pretty sure it's B and C.
(((SHORT EXPLAINATION)))
Thomas Jefferson bought 800,000 miles worth of land from the French, (West of the Mississippi River)
Mexico was given up I'm pretty sure out of fear - and they gave the U.S. Califoria sometime too.
Hope this helps!
