I'm not sure if this is correct, but I believe it would be that plants need carbon dioxide (plants are living) plants need carbon dioxide to produce oxygen for humans to breathe in, not totally sure if this is correct like I said but I hope I kind of helped. :)
Answer:
B
Explanation:
Input force - the force a man apply on the inclined plain. It is less than the force the man should apply if he would just push the ball up.
Distance = hypotenuse becomes longer, that vertical distance (vertical leg).
The answer is because when the heart pumps blood in the artery during systole it counteracts the resistance provided by the blood vessels. This requires high pressure that is provided by the force of ejection due to the contraction of the ventricles. On the other hand, the pressure is lowest during diastole which is the ventricular filling of blood. There is low resistance in the blood vessels and the arterial wall pressure declines until the heart starts to contracts again.
By doing exercise, your heart rate should increase. when u exercise, more oxygen is pumped from the lungs to the brain to keep you alive.
Answer:
The answer of this question is continent and oceans.