Has the sport undergone any major changes since its original inception? if so what are they?

no but there is one of the oldest sport which is basketball

Explanation: Baseball is one of the oldest sports in the United States. It has not undergone any major changes since its original inception with the exception of equipment being upgraded.

depression is an ongoing sadness\lack of motivation. you feel and feel like its never going to get better. you're so sad to the point you think of death.

anxiety is an ongoing feeling of paranoia\ feeling like everyone is watching you and making fun of you. you get nervous easily and feel like the room is spinning.  

yes, they cause death every year. its a long, exhausting battle. only few make it through as sad as it sounds.

explanation:

answer: when you start thinking negitivly and start having suicidal thoughts

or harming yourself, sadness is part of depression as well as fear and anger combined