The question below consists of a set of labeled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

P. The division was usually based on temperature, which allows for different vegetation growth.

Q. Köppen’s map used different colors and shades to represent the different climate zones of the world.

R. Wladimir Köppen developed a climate classification system at the end of the 19th century.

S. The system divides the world into five climate zones.