What are the two main differences in the composition of the inner and outer planets?

The outer planets are made of mostly gas, like hydrogen and helium. They have faster orbits, and the inner planets have slower orbit and are made of mostly rock or metal.

Explanation:

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely