Question

Which type of sentence is this?
The maple leaf, which is Canada's national emblem, has been associated with the country since the 1700s.

Answer 1

It’s a complex (declarative) sentence.

Reason: the main independent clause is “The maple leaf has been associated with the country since the 1700s,” and it contains a non‑restrictive (parenthetical) relative clause “which is Canada’s national emblem” set off by commas.