Step-by-step explanation:
''The text mainly talks about the beginning of Asian baseball and how interested they were in developing their skills until the professionalism is reached.'' is correctly written sentence that has four verbs in it proving actions and main idea of it.
This sentence is describing text about the Asian baseball, its beginning and how the baseball players in Asia were acting. We can see that they were passionate about the sport and they were trying to do their best.
Also, this sentence is referring to the text called ''Baseball in Asia''.