Help pls asap 20 points

The variables for this experiment include the number of each type of sprout, the average height of those sprouts, and the amount of compost given to each plot of land. use the drop-down menus to complete the sentences and identify the independent and dependent variables. the independent variable, the one that you intentionally manipulate, is the the dependent variables, the ones that you measure the response in, are

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Ecology can best be described as the study of what