Answer:
That contraceptives such as condoms protect from STD's but not 100% protection from babies. Contraceptives such as the pill or IUD's do not protect against STD's but not completely effective either. Appropriate personal limits may include reducing the amount of sex you have or only doing what you are comfortable with
Explanation:
Bones and the skeletal system they make up serve to provide the body support and protection of the vital organs
"When water molecules escape from your frozen food, it is also possible for oxygen molecules to seep in. The oxygen molecules can dull the color and modify the flavor of your frozen product. Food that has freezer burn is safe to eat, but you may find the texture and taste not to your liking."
Source - https://www.loc.gov/rr/scitech/mysteries/freezerburn.html
Senses are first. Then they relay information through nerves.