The Sentence finishes with a string of "wh-" noun clauses. These clauses usually are not concerns, so the final one particular must also not be a matter. "Which one particular will be the best" is clearly an issue structure, so it is sensible that " صورة العصر الحديدي (الأفلاج) من https://share.evernote.com/note/8017dd9b-bae1-b7b2-e7a5-981f51e2ee16