If eating chocolate affects total calorie consumption, then increasing the amount of chocolate a person eats will increase the amount of weight a person gains.

which term is the dependent variable?

Weight of a person is the dependent variable.

Explanation:

Dependent variable is defined as the variable whose value changes with respect to any other variable.

Independent variable is defined as the variable which remain as such and has no effect on the change of another variable. For Example: Time

According to the equation:

The weight of a person is increasing as the amount of chocolate consumption is increasing.

So, here the independent variable is chocolate consumption and the dependent variable is weight of the person.

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.