The two principal river systems of Thailand are the Chao Phraya and the Mekong. Together, these rivers support the irrigation for Thailand's agricultural economy.
I believe the answer is A. hope this helps.
a sceince specific school book or website
In order to keep track of these diverse groups, anthropologists and geographers have divided them into “culture areas,” or rough groupings of contiguous peoples who shared similar habitats and characteristics.
Africa to America because it was the longest and most dangerous journey.<span />
