Answer:
I am essential to life on earth! I am split into thirds. Two thirds are the same. One of the thirds is 8. The other two are 1 each.
u always follow me but I am rarely seen
What kind of tree can you carry in your hand?
I go up and down at the same time. Up towards to sky and down towards the ground
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?