Learn Italian: Amo tutti gli animali dello zoo. - I love all the animals in the zoo.

In Italian, when you want to say "all the" followed by a noun, you must use the correct form of tutto plus the definite article (the word for "the"). Since animali is masculine plural, we use the plural form tutti followed by the article gli.

Why use the article gli for animali instead of i?

Because animali is a masculine plural noun that starts with a vowel. In Italian, masculine plural words starting with a vowel always take gli as their definite article.

The translation says "in the zoo", so why does the Italian use dello instead of nello?

While English says the animals are "in" the zoo, Italian typically expresses this as a relationship of belonging. It uses the preposition di (of) to mean "the animals of the zoo". You could say nello zoo if you were emphasizing their physical location inside, but dello zoo is the natural way to refer to the zoo's population of animals.

How is dello formed, and why not use del?