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"Morena" is a form of "morena", a noun which is often translated as "moray eel". "Ella es alta" is a phrase which is often translated as "she's tall". Learn more about the difference between "ella es alta" and "morena" below.
ella es alta()
A phrase is a group of words commonly used together (e.g., once upon a time).
a. she's tall
Ella es alta, y en cambio su hermana es más bien baja.She's tall, while her sister is rather short.
la morena()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).