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.

Janine studies to improve her math skills

Read the excerpt from "the blackfeet creation." how do readers know that this excerpt is from a myth? the excerpt describes an animal called a muskrat. the excerpt describes old man drying the mud. the excerpt describes old man scattering mud over water. the excerpt describes how muskrat create land.

Can anyone plz with this question i accidentally posted on physics it's 99 points plus this 5 ponts and will mark as brainliest link :