Supposed a biologist design an experiment to study the effect of water pollution on the reproduction rate f salmon. what is the dependent variables in this experiment

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.

chemical because it warmed up which involves temperature and it bubbled which includes changing

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the answer is d. chordata