Learn Italian: Fa' una foto al lupo con il telefono! - Take a photo of the wolf with the phone!

Fa' is the irregular informal command (imperative) for fare (to do or make). It is a shortened version of fai. The apostrophe indicates that the final vowel has been dropped. Both fa' and fai are correct and commonly used when telling a single person to do something.

Why use fare here instead of a word for the English verb take?

In English we take a picture, but in Italian you make a picture. The standard phrase is always fare una foto.

The English translation says of the wolf, so why does the Italian use al instead of del?

In Italian, the expression is fare una foto a (to make a photo to someone or something). Because lupo (wolf) takes the definite article il, the preposition a (to) combines with it to form al.