Answer:
Because people wanted to focus on fun and forget their sadness, baseball became more popular after World War II.
Step-by-step explanation:
Transitional tags that show cause and effect include, thus, therefore, then, because, consequently, as a result, hence, accordingly, for this reason. As the name implies, these tags tell us what caused a particular thing and the effect it had.
In the sentence above, people's desire to focus on fun events as an escape from their sadness is a cause or reason that resulted in an effect - the popularity of baseball after World War II.