1. describe the differences between interval training and strength training?

The difference between interval training and strength training is interval training is training in which an athlete alternates between two activities, typically requiring different rates of speed, degrees of effort and Strength training is a type of physical exercise specializing in the use of resistance to induce muscular contraction which builds the strength, anaerobic endurance, and size of skeletal muscles.

the last statement is correct i.e.

when your heart is not pumping enough blood around your body because your heart is severely failing, you may need an artificial heart. an artificial heart is a mechanical device, about the size of an orange, that is connected to your heart or implanted in your chest to or replace a failing heart.