* The object has a larger surface area: A wider, flatter object catches more air, leading to greater resistance. Think of a parachute versus a rock.

* The object has a higher speed: The faster an object moves, the more air it pushes against, increasing the resistance.

* The air density is higher: Denser air (like at lower altitudes) provides more resistance than thinner air (like at higher altitudes).

* The object has a less aerodynamic shape: A smooth, streamlined shape cuts through the air more easily, leading to less resistance. A jagged, bumpy shape will create more drag.

Let me know if you'd like more details on any of these points!