Answer: Los ojos verdes
un árbol alto
unas lámparas feas
las mochilas peqeñas
las camisas negras
la falda corta
los examenes dificiles
los estudiantes estadounidenses
Explanation: In Spanish typically when a word ends in "o" it is masculine and can have the ability to change to an "a" with is feminine. "El" and "Los" is masculine, "Las" and "La" is feminine. You add an "s" when the word is plural.