Ally is a junior high student who has just learned about the carbon cycle in school. She is concerned about the environment and decides to construct a model of the carbon cycle in her community.

What could both add and remove carbon from the atmosphere in the model?

The image shows an arrow pointing from the animal to the atmosphere, an arrow from the atmosphere to the tree, an arrow from the tree to the atmosphere, and an arrow from the automobile to the atmosphere. The illustration shows a car, a deer, and some trees. Arrows go from all three to a label: CO2. Another arrow points down from the CO2 label to the trees.

A. a car
B. a deer
C. an insect
D. a tree

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.