Mexico City (19° 25' 57.85'' N, 99° 07' 59.71'' W) is located within a valley that has a subtropical highland climate (Köppen Cwb), due to its tropical location and high elevation of 2,240 meters (7,349 feet) above sea level. The lower region of the valley is composed mainly of grassland that receives less rainfall than the upper regions of the south; the upper southern region is a mountainous region of pine and oak trees known as the range of Ajusco. Yearly average temperatures and rainfall: 9-23 °C (42-69 °F) and 7 cm (2.8 in).
No. It has it all: from steep mountains to hilly terrain to flat lands.
Parts of Australia's deserts are flat and others are hilly.
Flat
flat
The opposite of hilly is flat or level.
flat in the north (near the sea) to mountained in the south (part of the Alps)
is golden sands hilly or flat
Extremely flat
relatively flat
Greece is mostly hills and mountains.
Because with the exception of polar climate, Mexico has almost every climate: desert, grassland, tropical rainforest, savanna, pine and oak woods; flat, hilly and mountainous.
None, actually. While most of Brazil is a flat land that belongs to the Amazon basin, most of Mexico is hilly, with very few navigable rivers. The only region of Mexico that "looks" like Brazil is the Yucatan peninsula, which is flat and harbors several rainforests.