An area in your state has been flooded due to heavy rains. How might scientists from the three main branches of science interact in their study of the flood, its effects, and how future flooding might be controlled?
OK, I will bite: What do you think the three main branches of Science are? That is very highly debatable.
Physics, chemistry, and computer science?
Physical science, biological sciences, and computer sciences?
I hope you havent included Earth sciences, they by definition are physical sciences...
So whatever your teacher has opinionated you with, go through the question and write out how their knowledge can influence the study of the flood and impact.
I will be happy to critique your work.
Please tell us what your teacher/textbook define as the three main branches of science. We'll be glad to help you if we have more information about your assignment.