Articles : le , la , un , une , e.t.c.
Link : learning loom
when le or la appears in front of a noun that starts with a vowel or silent ' h ' , the vowel in le or la disappears, and is replaced by ' . This is known as an elision. i.e. l'homme , l'enfant
Elision also has an affect on du , which is why you also get:
de l'aéroport. . Un aéroport is a masculine noun.
Découvrez l' environnement de l'Aéroport Cannes : Discover the region around Cannes airport.
The french article needs to agree with the noun it modifies. As a general rule in french, there is an article in front of every noun, unless you use another type of determiner, such as :
possessive adjectives : mon, ton, etc.
demonstrative adjectives : ce, cette, etc.
It is highly recommended to learn the article alongside learning each noun.
You will have noticed that due to liaison, if you just learn the Definite article, when a liaison occurs, you can't tell whether it is a male classified noun or a female one. In those cases particularly when a noun starts with a vowel, I recommend learning the indefinite article using un and une.
Can someone have a go at simply explaining why you things like "de la soupe". I have had it explained before - but I just can't think how to say it at the moment.