What is the term for a word that takes the place of a noun in a sentence?

A pronoun is a word that takes place of a noun in a sentence. Examples of pronouns are he, she, it, they, etc.

He is dancing./ Romeo is dancing.

here in the first he is a pronoun and here Romeo is noun.

recent news about two years ago indicates that a polish forestry student by chance unearthed at a depth of about 40cm (16 inches), during digging in a damp polish forest he found a 13-page manuscript into a thermos flask.

greek jew marcel nadjari was a aischwitz slave who witnessed how the nazi's built big death chambers and crematoriums and told how he was forced to escort fellow jews to the gas chambers. he accounts on this manuscript how the nazi's disguised this chambers to look like showers. also, he describes this place as a process of extermination from the chambers to the trains arriving to take the bodies.

i believe that the answer is b! i hope i out!