Write the next sentence in the following story.

How to take care of ducklings
Find a brooding box.
After ducklings have hatched from their shells and spent about 24 hours getting used to their new surroundings, they're ready to move to a brooder. A plastic storage container, sturdy cardboard box, or large glass aquarium can all work for this purpose.

pick from the following. +The box should be well-insulated, since the ducklings need to stay warm. Don't choose a box with too many holes in the sides or the bottom.; +Ducklings may not be comfortable letting other people out of their homes while they are looking for the nest. Choose an aquarium that is suitable for working in a quiet, confined space where temperatures are under control.; +Large windows and open doors are also great, as long as the temperature stays just below freezing. Look for a humidity-stabilized box lid or cover.; +Remove your materials and fill it with sand and a few inches (about a foot) of water. The water should be warm and comfortable for your ducklings' acclimation to their new environment.;. The answer should be
The box should be well-insulated, since the ducklings need to stay warm. Don't choose a box with too many holes in the sides or the bottom.