1. develops
A child develops rapidly between the ages of 13 and 16.
develops the mind
When she catches a cold, she often develops bronchitis.
The company develops new products every other month.
Happiness is beneficial for the body, but it is grief that develops the powers of the mind.
This film develops fast.
As the play develops, the real motives of the protagonist become clear.
As economy develops, labor-intensive industries give way to capital-intensive industries.
As China develops, more and more countries want to have good relations with it.
Monotony develops when you harp on the same string.