As a noun:
* The enclosure for the sheep was made of sturdy wood. (This sentence uses "enclosure" to refer to a physical space.)
* Please find the enclosed document with more information. (This sentence uses "enclosure" to refer to something included with something else.)
* The writer used many enclosures in their essay to support their arguments. (This sentence uses "enclosure" to refer to supporting information.)
As a verb:
* The farmer enclosed the field with a fence. (This sentence uses "enclosed" to describe the action of surrounding something.)
* The letter was enclosed in a sealed envelope. (This sentence uses "enclosed" to describe the action of placing something inside something else.)
* The city council enclosed the park to protect it from vandalism. (This sentence uses "enclosed" to describe the action of restricting access to something.)
To give you a more accurate sentence for "enclosure," I need more context. Please tell me what you would like the sentence to convey.