C'est vs. Il est/Elle est
Both ce and il/elle can represent the definite (things that have gender- this includes both persons and nonpersons).
Il/elle are used generally when the noun is not modified by an article.
|Il est pompier. He is a fireman.
Elle est médecin. She is a doctor.
When the noun is modified use ce.
Ce should be used before proper nouns and pronouns.
Before an adjective
Either c'est or il/elle est can be used before adjectives. When c'est is used, the phrase takes on a wider meaning. The pronoun ce represents the entire class of an object, while the pronoun il/elle normally represents an object in particular.
Ils nous ont servi du roblochon. .. They served us roblochon cheese..
practice C'est vs. Il est/Elle est