Question

Alice decided to throw her new shirt in the dryer. It shrank and no longer fit Alice. Shrinking her shirt was a of Alice's decision to use the dryer.

Answer 1

The answer of the question is reason

Answer 2

When Alice washes her clothes the water she applied must have been of high temperature. This warm water makes the fabric of the clothes to shrink.
Another reason behind it can be the drying. Due to the process of drying the moisture inside the cloths get removed and the fabric like cotton or wool return from the stretched position to the shrinked position and it is the reason the new shirt do not fit Alice