Which of the following statements describes one of the key decisions for personal safety while exercising?

You didn't provide us with any following statements? But a thing which is very important and is highly relevant for personal safety and is reflected as key decision when exercising would be that we always try to stay within the reach of our capabilities and don't try to show off in front of others which could negatively affect our performance over time.

Explanation:

answer: our bodies are made up of mostly water, we rely on it to regulate our body funtions.

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made