Answer:
ik been boter ham man en appel en melk ;-$
Explanation:
Variation means difference in genetic makeup between individuals within a specie.
Answer:
Blood is carried away from the heart by arteries. Blood that is rich in oxygen. Blood that is low in oxygen is returned to the heart by veins. there is more pressure in arteries than in veins.
When cool air sinks it forces warm air to rise is a example of convection.
If i would have to make an educated guess, i would say C.
