Answer:
We visited the shelter where many animals are waiting for homes. [Complex]
We petted the cats, and they purred while the dogs barked in the other room. [Compound-Complex]
The dogs wanted to play, and we took them to a dog park. [Compound]
We spent an hour at the park, which was packed, and then we left. [Compound-Complex].
About Complex sentences:
A sentence comprising one independent clause and at least one dependent clause is called a complex sentence.
Complex sentences are simple to recognise because they frequently contain subordinating conjunctions to connect clauses, such as because, since, or until.
Explanation:
hope ti helped