Final answer:
The sentence 'Monkeys are funny but lovable animals in the jungle.' is a compound sentence because it has two main clauses joined by the coordinating conjunction 'but'.
Step-by-step explanation:
A compound sentence will contain two or more main clauses which are equally important to the meaning of the sentence. In the given example sentences, the sentence 'Monkeys are funny but lovable animals in the jungle' is a compound sentence because it has two main clauses joined by the coordinating conjunction 'but'.
One way to identify a compound sentence is to look for coordinating conjunctions (For, And, Nor, But, Or, Yet, So). In this case, 'but' is the coordinating conjunction that joins the two main clauses.