Question

dad went fishing, but mama decided to stay home.
complex sentence
compound sentence
simple sentence

Explanation:

A compound sentence connects two independent clauses (complete thoughts) with a coordinating conjunction like "but". The given sentence has two independent clauses: "Dad went fishing" and "Mama decided to stay home", linked by "but". A simple sentence has only one independent clause, and a complex sentence pairs one independent clause with a dependent clause.

Answer:

compound sentence