Medical problems or at least something wrong with you because there are different problems <span />
Blood is responsible for transportation of Oxygen in body which is the part of Cardiovascular system.
therefore, correct choice is :
- D.) Cardiovascular system
Teens, athletes and pregnant women need the most calories per day.
Teens need more because they're still growing.
Athletes need extra calories to burn during their exercise.
Pregnant women because they need to feed the baby and themselves.
(Don't know how to explain)
Hope this helps, mark brainliest please!
Answer:
Well some people don't get enough sunlight during winter and some don't drink enough orange juice. Others might have a disorder where their body doesn't produce enough vitamin d
Explanation:
