Can humans be primary, secondary, and tertiary consumers?

  usually, loads of more than pounds require the assistance of a second person.           a. 40   b. 20   c. 50   d. 30

What information does a survey provide? a. an accurate description of the population surveyed b. whether there is a predictive relationship between two variables? c. whether there is a cause-and-effect relationship between two variables d. none

Why is the continental divide important?