If Nia is hanging upside down from a horizontal bar at the playground, her friend Kiran notices that Nia's loose t-shirt is hanging towards her head. Kiran wonders why Nia's shirt doesn't fall towards the ground. What's the explanation?

Respond very briefly.
Gravity pulls everything towards the Earth's center. When Nia is upside down, her t-shirt, which is not tightly secured to her body, is still subject to gravity. This causes the shirt to hang away from her waist and towards her head. The shirt doesn't fall towards the ground because the part of the shirt around Nia's waist remains in place, while the rest of the fabric is free to move down towards her head due to gravity's pull.