Which of the following is an example of a run-on sentence?

swimming is a good sport it build muscle.
he has been a swimmer since he was very young.
because of this, he has grown up to be quite strong.
he will probably love swimming his entire life.

Abig total of my last 30 points and brainliest for if u go to my previous questions u can awnser the 100 pointers think of an intense argument you had or witnessed sometime in your life. close your eyes and remember every detail. to turn this into a dramatic scene you will need to make changes that will make it make more sense to the audience. 500-600 words a description of the set up that explains what happened before the scene diction that matches the characters character objectives and obstacles are clearly conveyed a scene that escalates in dramatic intensity diction that is appropriate to the audience words that are not wasted in idle chit chat action (stage directions) that enhance the scene proper formatting for drama