How can you know that something is written in first person point of view?

She liked ice cream, but he liked cake. So they brought both.

A personal narrative is written in _____ person point of view.

Which point of view is the following: "There is one mirror in my house. It is behind the sliding panel in the hallway upstairs"

What point of view is the following: Cathy leaned into her computer screen with big eyes. She couldn't believe it. She had finally gotten a 100 on her math test! She knew her parents would be proud of her.

What point of view is the following: Maria introduced her project, which Amy thought she did too enthusiastically."

True or False: Point of view is utilized in any piece of literature.

What point of view is the following: "Effie Trinket trots to the podium and gives her signature, "Happy Hunger Games! And may the odds be ever in your favor!"

We go to the mountains every winter for vacation.