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"Naranjas" is a form of "naranja", a noun which is often translated as "orange". "Manzanas" is a form of "manzana", a noun which is often translated as "apple". Learn more about the difference between "naranjas" and "manzanas" below.
la naranja()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
la manzana()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).