Answer:
Studies have also shown that television hinders kids’ mental faculties and growth; there’s a reason why it’s famously referred to as the “idiot box.
Step-by-step explanation:
According to the given excerpt, the narrator talks about the negative effects of watching too much television and how bad of a problem it is.
Statistics is used to show that children who watch TV more regularly perform worse than other children who do not spend as much time watching the television.
Therefore, the sentence in this excerpt that forms the purpose statement for a speech about the negative effects of watching too much television is "Studies have also shown that television hinders kids’ mental faculties and growth; there’s a reason why it’s famously referred to as the “idiot box"