The answer is a. because you cant create or destroy it only change its state
<span />
Answer:
Variables are given a special name that only applies to experimental investigations. One is called the dependent variable and the other the independent variable. The independent variable is the variable the experimenter manipulates or changes, and is assumed to have a direct effect on the dependent variable.
___________________________________
<h3>Please mark me as Brainlist</h3>
Science proceeds by scientific method and use of experimental method. The answer is true because following these steps will get the steps and results you need. There is nothing more to be done. The method is observe a question, make a hypothesis, test the hypothesis with controlled experiment, analyze data. reject or accept hypothesis, and form a conclusion.
Answer:
Movement in some flatworms is controlled by longitudinal, circular, and oblique layers of muscle
hope this helped you
please mark as the brainliest (ㆁωㆁ)
