Clarifying だから use at the end of a sentence


I was given this sentence:

ここが、きみの クラスだから。

The explanation I was given is that the から at the end is used when giving
information. What is the だ used for? What are other examples of だから usage?




「から」 used to indicate a cause or reason must follow a verb or adjective. 「だ」
is the copula 「である」, which binds the noun it follows with the causative
particle「で」 and the existence/possession verb 「ある」 in order to turn the noun
into a verb clause.

