The poles receive more direct sunshine so it has to do with the angle that the light hits. The Earth is round and when light hits it the light wraps around the earth. At the poles the light is very stretched and at the equator it is very direct hence it is hotter at the poles.
The lowland areas of Latin America are very important because of multiple reasons. The majority of the agriculture and farming of animals is taking place in the areas like this, so the food sector is directly connected with them. On top of the agricultural production, these lowlands produce a lot of food on their own. The industries that use as their main material also are directly dependent on these lowlands, as they are mostly covered with numerous types of high quality tropical tree species. There's thousands of species of plants that are used in the medicine, so the pharmacies are also very dependent on them. All in all, these lowlands managed to contribute a lot in the economy, health, and general well being of the Latin American countries.
Urban area" can refer to towns, cities, and suburbs. An urban area includes the city itself, as well as the surrounding areas. Many urban areas are called metropolitan areas, or "greater," as in Greater New York or Greater London.
I’m not sure if this was the answer you were looking for but I hope this helps ✨