Blood in the pulmonary vein is oxygen rich, while in all of the other veins, it is oxygen poor.
Hope this helps... mark as Brainliest plz
The answer should be C if not then it is D
Calories is watching fat intake with food. if you're trying to watch your calories yes it's the fat, because you are trying to eat less fat to maintain a good diet.
sugar crash is to much sugar intake and it makes you fatigue and go to sleep or you feel drowsy and lazy. To much sugar intake is a reason for sugar crash.
