Why do you think trenches were used during WWI?

During WWI, trenches were used to try to protect soldiers from poison gas, giving them more time to put on gas masks. Dysentery, cholera, typhoid fever, and trench foot were all common diseases in the trenches, especially during WWI. Gigantic rats were common in the trenches of WWI and WWII.

Explanation:

in which two ways were the northeast woodland indians and the southeast indians similar? both collaborated to form the iroquois confederacy. both cultivated the crops of corn, beans, and squash. both lived in rich environments of swamps and rivers. both lived in tree-bark dwellings called wigwams. both expected men to hunt, while women farmed.