Natural elements of the ecosystem are often borderlands, for example rivers or mountains, the Great Lakes.
The Treaty of Guadalupe Hidalgo ended the U.S.-Mexican<span> War. </span>Signed<span> on </span>2 February 1848<span>, it is the oldest treaty still in force between the ... basic form it called for the cession of Alta and Baja </span>California <span>and </span>New Mexico<span>, the right of transit across the Tehuantepec isthmus, and the </span>Rio Grande<span> as the southern </span>border<span> of </span>Texas<span>.</span>
As people became more interdependent, they needed to live closer together. ((apex))
I believee the answer is A.
Answer:plants were verry useful
Explanation:
