Measure your heart rate before, during and after work outs and write it down. Monitors can be worn as a strap across the chest, on the wrist and even on the head, and by measuring your heart rate can help you exercise at the right intensity. Most don't have a display, so you'll need to connect your monitor with a sports watch or smartphone app to see your heart rate.
Answer:
b, c, d
Explanation:
it makes it smell better, adds flavor to it and keeps it fresh for a longer time.
Erosion is caused by ice because of the freeze thaw weathering. It s naturally caused by water, wind, or gravity.
Supporting connective tissue. Hope this helped! [:D]===[
The answer would be artificial pacemaker.