What is the most complex ecosystem in the world?

What are the 4 main reasons to provide information

Why is the supreme court decision in roe v. wade so controversial.

Which of the following world and national events led to a new view of people with disabilities in the us:     a.  world war i and ii veterans with disabilities returned home after the wars.b.  john f. kennedy was elected president and had a sister with a disability.c.  the civil rights and feminist movements.d.  all of the above.