Cities like london and paris have become among the largest in the world, in part to its climate.

temperate

Explanation:

London and Paris are very large cities. Both of them are located in the western part of Europe, with Paris being the capital of France, while London is the capital of the island nation of the United Kingdom.

These cities are located in plains, with large rivers running through them, and they are close to the sea. This has resulted in both Paris and London being heavily influenced by the sea, which has made their climates relatively pleasant.

The temperatures tend to be moderate, warm in summer, but without extremes, while the winters are cold, but also without any extremes. Also, there is significant amounts of precipitation throughout the year. The people naturally chose these places for living as they have more pleasant climate, thus it provides good living conditions, so over time as more and more people flocked in, these cities became enormous.