'Preserve' in the Bible

You are to preserve a few strands of hair and hide them in the folds of your garment.

"But I'll preserve a few people out of the violent death, famine, and pestilence, so they can recount their detestable practices among the nations when they'll go there. Then they'll know that I am the LORD."

"The river delta will consist of swamps and marshes that will remain a salt water wetland preserve.