How do paragraphs 6 and 7 contribute to the author's development of ideas in the article?
a they show that genes have more influence than environment.
b they show that the nature-versus-nurture debate is complicated.
they suggest that environmental factors may cause certain illnesses.
d
they say that the nature-versus-nurture debate is a pointless exercise.

a question like this requires the excerpt to be included in order to answer the question.

the statement that best explains why the tenth amendment reserves some rights and powers to states is that the framers believed in the principle of federalism. this principle says that some powers are in the hands of a centralized national government, while others are reserved for the governments of several states.

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the rigid outer part of the earth, consisting of the crust and upper mantle is the lithosphere.     answer   crust and outer part of the mantle.