Simpatica.
This is because Maria is a female and it is only her (singular).
The theory developed based on observations made on the Galapagos islands was, Natural Selection.
I hope I helped you!
Source: https://socratic.org/questions/which-theory-was-developed-based-on-observations-made-on-the-gal-pagos-islands
"The trip to Disneyland took one hour" is "El viaje Disneylandia tomo una hora"
and..
"In Disneyland, we went on rides" is "En Disneyland, fuimos en paseos"
Flash cards helped me a lot
