Answer: A - Terracing crop
Explanation: Terracing crop is a soil conservation strategy of growing crops on hill side by planting crops on graduated terraces perpendicular to the slope of the land . This method is useful in reducing soil erosion.
More information not sure what you mean by “Collect some recent activities in sports” but thanks for the points :)
Answer: 3) Confounding variable
Explanation:Confounding variable is the variable that indicates about the external influential factors that produces the manipulated consequences of independent and dependent variable.This variable can lead to producing useless outcomes in an experiment.
According to the question, the changes occurring in interest of student in algebra can be due to the outside factors which are not generating the actual results and thus, experiment is getting ruined.
Other options are incorrect because application variable remain same for the experiment,system variable are the variables of certain system and reliability variables describe about the variable on which dependent or stable.Thus, the correct option is option(3)
Immediate rewards is the answer
