Pls help What is the independent and dependent variable of this experiment?

How heart rate changes during and after an exercise is performed for two different periods of time

What are the three types of counseling established by marine corps policy?

Which is the correct formula for photosynthesis

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.