Here are the suggested words to fill in the blanks:

1. **for**
2. **from**
3. **styles**
4. **happier**
5. **but**

The completed passage would read:

Pablo Picasso was a famous Spanish artist, born in 1881. He is best known **for** creating a new art style called Cubism, where he used shapes like squares and triangles to show people, animals, and objects from different angles at the same time. This was very different **from** traditional art, and it changed the way people looked at painting. Picasso had many different **styles** throughout his life. In his "Blue Period," he painted sad scenes using mostly blue colours. Later, during his "Rose Period," he used warmer colours like pink and orange to create **happier** images. Over his life, Picasso made more than 20,000 pieces of art, including paintings, sculptures, and ceramics. He loved to try new ideas and challenge old ways of thinking. Picasso died in 1973, **but** his art still inspires people today and is seen as very important in the world of modern art.