The largest canyons and deepest valleys were created by
a. moving water.
c. wind erosion.
b. chemical weathering.
d. plate tectonics.

What can you learn about precipitation levels in south america from this map? brazil is experiencing a drought.it rains more in higher altitudes.peru received the highest level of rain.venezuela got less than 25 cm of rain. 

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire