Answer: This excerpt is first person point of view. We know this because of the personal pronouns that are used throughout it (I, me, my, etc.). If it was second or third person, pronouns like he, she, it, they, etc. would be used in place of the personal ones. We would also see a slightly different version of the scene.
Explanation: Since this is first person, it is told from the giant's perspective. If it was told from a different point of view, it would most likely be a narrator that is not the giant and just a by-stander.