Question

multiple-choice question
what is the dependent variable?
concentration of barnacles on the side of the boats
number of barnacles
number of boats
concentration of anti-barnacle additive

Explanation:

In an experiment related to barnacles and anti - barnacle additives, the dependent variable is the one that is being measured and is affected by other variables (independent variables). The number of barnacles would depend on factors like the concentration of anti - barnacle additive (independent variable) or other factors related to the boats. The concentration of barnacles on the side of boats is more about a spatial - concentration measure, the number of boats is a factor related to the setting, and the concentration of anti - barnacle additive is an independent variable (the variable we might manipulate). So the dependent variable is the number of barnacles as it is the outcome we are likely measuring based on other factors.

Answer:

B. Number of barnacles