A sentence classified as complex consists of one independent clause and one or more dependent clauses.
The dependent clause relies on the independent clause for complete sense.
Conjunctions such as because, although, when, which, or that typically link these clauses.
Example: I stayed at home because it was raining.
In this example, “I stayed at home” functions as the independent clause, and “because it was raining” is the dependent clause, specifying the reason.
Complex sentences facilitate the expression of detailed and lucid ideas.