the first answer as blood needs to be oxygenated to be passes round the body then when its deoxgenated it will return to the heart to be pumped around the body again
Answer:
it provides energy to the body.
Answer:
Nitrogen fixation
Explanation:
The plant's root absorbs the nitrogen
It helps make the hair grow faster and gives it nutrients
Density.
If the density is more than that of water than it sinks.
If it is less than it floats.
Density is the amount of mass in a certain space, therefore
D = M/V
Density = mass divided by volume