I’m pretty sure the mature river is the bottom one, the old river is the middle and the young is the top. Hope I’m helpful..
It is very hot and arid, which makes it hard to find edible food and drinkable water. There is not much vegetation.
The country is divided into five distinct physiographic regions: the folded mountains in the north and west, the Khorat Plateau in the northeast, the Chao Phraya River basin in the centre, the maritime corner of the central region in the southeast, and the long, slender peninsular portion in the southwest.
The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
Answer: Security Guard
Explanation: The security guard left last. You can see that this is true because the man and his dog's footprints are on top and the only prints that have not been disturbed by someone else.