The correct answer will be- reproduction rate of salmons.
Explanation:
The experimental design contains three types of parameters or variables: dependent, independent and constant.
The dependent variable is the variable which has to be studied in the experiment and depends on the independent variable whereas the independent variable is the variable which can be changed or manipulated in the experiment.
In the given question, the dependent variable to be studied is the "reproduction rate" of the Salmon and thus is the correct answer.
Methane is the gas that is strongly correlated with Earth's heating and cooling patterns. Did you know that cow's flatulence is methane gas?! Interesting fact!
