The Battle of Hastings took place about 7 miles northwest of Hastings, according to Wikipedia.
The battlefield was near the present-day town of Battle in East Sussex, between Caldbec Hill and Telham Hill. The location explains why the engagement is traditionally called the Battle of Hastings even though the fighting did not occur in the town itself.
William’s army had established itself around Hastings after landing at Pevensey. Harold’s English army approached from the north and took up a defensive position on the ridge traditionally identified as Senlac Hill. The elevated ground helped the English shield wall resist repeated Norman attacks.
The distance can cause confusion because different descriptions measure from different reference points, and some accounts describe the battlefield as roughly 7 miles north rather than northwest. The quiz’s 7-mile figure matches Wikipedia’s summary wording and is the canonical choice among the options.