highlight the two nouns that are the simple subjects.\nthe dogs are calm as long as they have adequate…

Brief Explanations:

The simple subject is the main noun that the sentence is about. In the sentence "The dogs are calm as long as they have adequate exercise", the main nouns that the sentence is centered around are the ones performing the action or being described. Here, "dogs" is the main noun for the first - part of the sentence about being calm, and "exercise" is related to what the dogs need.

Answer:

dogs, exercise