Which statement best describes how human activity has affected African savannas? A. The overfishing of waterways has reduced the food sources for many species.
B. The overuse of grasslands for herding and farming has made the soil infertile.
C. The replanting of forests has reduced the amount of grassland.
D. The clearing of large areas of trees has destroyed forest environments.

What statement about risks in social and behavioral sciences research is most accurate: anonymizing data effectively manages the risk of creating emotional distress.risks are specific to time, situation, and culture.there are never any risks.if a study offers potential benefits, it is not necessary to minimize risks.

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.

Government run farms are known as a. pastoral b. collectives c. irrigation d. dalits