EXPLICATION
EXERCICES:
http://www.didieraccord.com/exercices/index.php?ex=2.3.1.5
https://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-32449.php
http://platea.pntic.mec.es/~cvera/hotpot/connecteurs_de_causeb.htm
https://francais.lingolia.com/fr/vocabulaire/mots-a-ne-pas-confondre/a-cause-de-grace-a/exercices