The solar system has two types of planets, terrestrial and jovian. according to the nebular theory, why did terrestrial planets form in the inner solar system and jovian planets in the outer solar system?

Which are practical examples of how people in the developed world could make a big difference in how much water they use check all that apply a. use lightbulbs that use less electricity b. consider using a composting toilet that does not use water c. avoid using your telephone during peak hours d. do not read books