Hmmm...after getting "La granada" correct, the translation showed as "The grenade," not the pomegranate.
A pomegranate is filled with seeds like the fragments of a grenade. The Moslem gardens of the city of Granada (The Alhambra) were filled with luxurious fruits like the pomegranate. The word was probably include to demonstrate how one word can describe both an ugly weapon, a delicious fruit, and serve as the name of a beautiful city.
I am not sure what the pomegranate is doing in a lesson on places. Although I have been to and LOVED Granada... ;)