What is the difference between a simple sentence and a compound sentence in terms of their structure?

Sure, here's the difference between a simple sentence and a compound sentence:

Simple Sentence:

• A single independent clause.
• Contains a subject and a predicate.
• Cannot stand alone as a complete thought.

Compound Sentence:

• Two or more independent clauses joined by a coordinating conjunction.
• Contains a subject and a predicate for each clause.
• Can stand alone as a complete thought.

Here's an example of a simple sentence:

The dog barked.

And here's an example of a compound sentence:

The dog barked, and the cat ran away.

In simple sentences, the clauses are connected by a conjunction, while in compound sentences, the clauses are connected by a coordinating conjunction.