What is the dependent variable in Investigation 1? A
the motion of the cart

B
the weight of the cart

C
the force applied by the children

D
the number of children pulling the rope

The dependent variable is the variable that is being measured or tested in an experiment. ... When researchers make changes to the independent variable, they then measure any resulting changes to the dependent variable

Explanation:

i hope you understand

the answer is trees if i'm not mistaken

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.