Explanation:
If you are unsure what 3rd person is, it is the perspective of you telling someone else's story.
Example of a girl going to a lake story: (3rd person)
"The young girl was quick and fast, sprinting over every rock and pebble to reach the water. Her auburn hair flowed behind her as the girl rushed to jump into the lake."
Now if you wanted to do first person, it would be like you telling your own story.
"I was quick and fast, I sprinted over every rock and pebble to reach my spot. My auburn hair caught up with me and I saw my face in the lake's reflection."
There are plenty of examples of 3rd and 1st person story telling online but I hope this gave you the answer you needed.
