The best explanation for the different amounts of time it takes for a shoe and a shirt to fall to the ground, when released from the same height, is:
The difference in weight doesn't affect the time, but they are affected differently by air resistance.
This is because while both objects are subject to the same acceleration due to gravity, their shapes and materials cause them to experience different amounts of air resistance as they fall. The shirt, being lighter and typically having a larger surface area relative to its weight, is more affected by air resistance than the shoe, resulting in a longer time to fall.