How do you walk answer with a lot of science

When comparing the digestive and urinary system, we can conclude that they both

Explain why many people are concerned about uv rays? explain what causes the skin to burn in the sun? explain why people should avoid the sun if taking a photosensitive medication?

Which is one purpose of creating federal laws and policies for tobacco use? to people stop using tobacco products to implement health events aimed at fighting tobacco use to monitor the trends in tobacco use across demographics to reduce the amount of money spent on tobacco products