Aria is riding her bike. She is bent slightly over, holding onto her handlebars. She wants to go faster.

Bending her hips and bringing her head closer to the handlebars makes her body more streamlined. This reduces air resistance, so she can ride faster with less force pushing against her. Sitting upright or spreading her arms creates more resistance, and flapping her arms would not help her bike move faster.

AI-written and checked against the verified answer.