The article said, "Picasso remains renowned for endlessly reinventing
himself". Why, in this case, would they use the term "reinventing' to
describe him? What did he do to make people say that?

Pablo Picasso was one of the greatest artists of the 20th century, famous for paintings like 'Guernica' and for the art movement known as Cubism.

Summary of Pablo Picasso

Pablo Picasso was the most dominant and influential artist of the first half of the 20th century. Associated most of all with pioneering Cubism, alongside Georges Braque, he also invented collage and made major contributions to Symbolism and Surrealism.

Explanation:

reinvent means to change something completely or to try something hard or to have a hard life.

Picasso is described that way cause he didn't change anything into something new, but he went thru a lot in life and a hard life

Explanation:

franz marc (d) was an artist during the expressionist movement.