Which of the following refers to a bounce or spring back after one object comes in contact with another

"follow hollywood's hottest diet craze to use more calories and feel great" this article most likely a) provides an easy-to-follow nutrition plan b) includes recommendations that are unsafe c) gives expert advice on creating a healthy lifestyle d) sets a realistic goal for health and weight loss

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

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