The Chosen One did indeed have questions for the Force. He wasn't sure how he knew She was the Force, he just did, like he did with many other things in life; it was one of those many hunches he got that just told him that something was some way and that it was the absolutely truth and wasn't something he should bother with questioning. How could he question this presence when the sudden appearance of It had made him fall to his knees, too overwhelmed by how bright and effervescent It was? There was no denying what She was, but there was the nagging question of what he was and knowing that She was the one being who could give him a solid answer.
No more speculation. No more debating around him about the nature of his existence like he wasn't in the room or how he felt about any of it mattered. No more doubt. No more denial. Just an answer.
Anakin bowed. He wasn't sure what else to do in Her presence other than to show respect in the most Jedi way he knew how.