Young mountains to the west, old mountains to the east
In the center of the continents – the plains
In North America there are fewer lowlands in area, and in South America there are more
The belt of mountains in North America is wider, in South America it is wider
In South America, there is more contrast (mountains – lowlands).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.