Can someone help please

Which of the following is not considered a lymph node function? to house immune cells to transport lymph to filter blood to fight infection

Why do you need two different circuits of blood vessels in your body?

What is the best way to use the clean water act to address the issue of dirty water and diseases that plague asmall community? a) to report the number of cases of people who havecholera symptomsb) to provide health guidelines about effects from waterborne diseases c) to enforce standards that focus on chemical dischargeinto bodies of waterd) to carry out research that investigates how dirty wateraffects human health