Why do i breath and why do i need oxygen to breath

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

To avoid food poisoning, perishable items should not be stored in the refrigerator for more than days.

A75-year-old client was admitted to the hospital after having sustained a fall at home. she is diagnosed with a right hip fracture and is scheduled for surgery in the morning. at 2: 30 am she awakens from sleep with confusion about where she is. she insists that her daughter is in the other room and wants to see her. you attempt to reorient her to the surroundings with little success. she continues to insist that her daughter is in the next room. in reviewing the client’s record, what data would be considered a source of her confusion?