physical patterns
According to this chart, countries with a low GNI per capita have THIS in common.
This storm is an interaction between what 2 spheres?
This is why it is hotter in the summer and colder in the winter in Lincoln, Nebraska than it is in Dover, Delaware.
These population pyramids indicate that THIS is happening to the population in Japan.
These geologic forces are constantly reshaping this region.
According to this chart, the world's population began to grow rapidly in THIS century.