Bravery is the correct answer
Not only should the children should be taking care of the Grandparents. Everyone should be taking care of everyone. That's how family works. They should be because, the Grandparents would (should) do the same.
Answer:
Testimonial.
Explanation:
Testimonial is a formal statement testifying to someone's character and qualifications.
Answer:
it is a comma because you have to have a cordinative adjective to have a comma
Explanation:
Self-Publishing because you're writing it.