Her sisters have charming face.

In the given sentence, the word charming describes the kind of subject.

Hence, the word Charming is a descriptive adjective.

We had a fantastic holiday in Paris.

In the given sentence, the word fantastic describes the kind of subject.

Hence, the word fantastic is a descriptive adjective.

A Giraffe has a long neck.

In the given sentence, the word long describes the kind of noun.

Hence, the word Long is a descriptive adjective.