Final answer:
The title provided by Neil Armstrong for the Jack Higgins novel about a Nazi plot to kidnap Winston Churchill is 'The Eagle Has Landed'.
Step-by-step explanation:
Neil Armstrong provided the title for the 1975 Jack Higgins novel about a Nazi plot to kidnap Winston Churchill, which is A) The Eagle Has Landed. This historical fiction is set against the backdrop of World War II, during which Britain, under the leadership of Prime Minister Winston Churchill, persevered against Nazi Germany's attempts at invasion.
The real Churchill was a steadfast leader throughout the war, notably during the Battle of Britain, where British pilots valiantly fought off the German Luftwaffe, prompting Churchill's famous tribute to the RAF pilots, "Never before in the field of human conflict has so much been owed by so many to so few."