Answer:
The right answer is atmospheric nitrogen→bacteria→plants→animals
The crust since it is the outermost layer. Both the cores and the mantle are underground and are involved in very high temperatures. Answer is the crust
D.
All follow an elliptical path that has two foci, rather than a circular path.
Kepler found paths are elliptical, not circular
Terabytes. 1 terabyte is equal to 1,000 gigabytes