The term plain is used to designate those natural spaces that consist of low reliefs or of minimum altitude, close to sea level and with a certain type of particular vegetation for each ecosystem. The idea of a plain comes precisely from the notion of a plane, from something that has no volume or variations on its surface. Although the natural plains may show differences in altitude or in their relief depending on the type of region we are talking about, in general we will be referring to flat territories in which we do not find mountains, plateaus, hills or any type of pronounced elevation. What a contrast to the rest of the stage.
Plains are considered to be the best space for human habitat since they allow much easier development of activities such as livestock, agriculture or grazing: by not presenting irregularities, differences in altitude or variations in climates, they favor the permanence of the human being. In addition to allowing easier and more accessible management, the plains are usually some of the most fertile and propitious territories for the growth of any type of plant or vegetable. Plains can vary in terms of altitude between one and another (with plains less than 700 meters above sea level on the planet and others that are more than 1000 meters above sea level). What matters is that within the surface of this plain there are no very marked variations in altitude or volume.
Normally, the most common plains take place in lowlands near the sea in which the terrain has not yet gained great height, or also in valleys that are naturally generated between mountain ranges or between mountains. We find different types of plains according to their formation: coastal, alluvial, lake, glacial and lava plains.
