What type of sentence is In one traditional speech the leader would give thanks for harvest?

The sentence "In one traditional speech the leader would give thanks for harvest" is a complex sentence.

Here's why:

* Independent Clause: "The leader would give thanks for harvest" is the main clause, and it expresses a complete thought.

* Dependent Clause: "In one traditional speech" modifies the main clause by telling us when the leader would give thanks. This is a prepositional phrase acting as an adverbial clause.

Because it has one independent clause and one dependent clause, it's considered a complex sentence.