The key concepts in expository text are developed and explained by using supporting details. Details give a good insight to what you are trying to say or explain, and make great support to any text.
Your answer is: Supporting details
Have an amazing day!
Since the participle in this sentence is 'floating', it modifies the noun next to it, which is 'buoys'. So A is the correct answer.
It's to develop the theme "death conquers all" hope this helps
I think the answer would be D, because the adults making the decision would want to think about the kids