Answer:
Entre los vertebrados, la fertilización externa es más común en anfibios y peces.
(Espero que eso ayude)
The second one should be Ella
The third one could be ustedes not sure on that one though
This would be Columbia: it borders Panama, which is a Central American country.
Panama actually used to be part of Columbia until 1903, and back then this question would have a different interpretation as the South-Central America border would be INSIDE a country
