im pretty sure these are the correct answers (:
for the first one it is change in rainfall. the second one is 25%. the third is surpluses of food abundant food suplies. the fourth one is exploiting and misusing a resource making new products out of raw materials. hope this helps! (: brainiest?
Answer:
Part of this border follows a natural boundary.
Explanation:
The answer is this one because Its a natural line between texas and Mexico and there are no mountains