Because that would make it have more syllables. Since usually a u following a g and before an I makes it so the g is hard, they have to do something so that the u serves another function so they do ü.
I think Galapagos Penguins have a large diet of fruit, fish, and other things.
The sentences are made to make no sense to prevent guessing words. People who don't know what "frutas" mean could say "Penguins eat fish"
Is "the penguin eats fruit" a corret sentence? i thought it can only be "the penguin eats a fruit" or "the penguin eats fruits".
Yes, fruit is one of those English words that can be either singular or plural, although fruits is also used. Generally, the word fruits is used when there's a specific number of fruits: "The gift basket contains five different fruits", and fruit is often used when you're talking about fruit in general: "The flying fox primarily eats fruit"
Wow :) got it on first try. It's pretty cool how Spanish is really close to English, like in English you would say "The Penguin Eats Fruit." and in Spanish, Penguino and Fruta sound like Fruit and Penguin in English :3