les cheveux raides
Straight ahead is 'droit devant' or 'tout droit' in French.
des cheveux raides
Heir is an English word - the French equivalent is - un héritier.
directement du coeur
You would say an heir because it is pronounced "air" - so the vowel sound means you have to use an.
J'ai les cheveux raides.
j'ai les cheveux raides
What is the right way to say is Prince Charles an heir to the throne or a heir to the throne
it is a French braid that you use the hair to braid
The wife of the direct heir to the French throne is traditionally referred to as the "Dauphine." The title is derived from the historic title "Dauphin," which denotes the heir apparent to the French throne. While the title is not currently in official use due to the abolition of the monarchy, it remains a part of French royal history and culture.
J'ai les cheveux longs et raides
Droite sur la deuxième à droite.