Hydrogen is the most abundant element in the universe. We humans are mostly full of water, water is made of 2 parts hydrogen and 1 part oxygen meaning that if we don't have Hydrogen we also have no water.
They basically do what humans do to survive. Like humans need to eat to survive and we also need to sleep to survive.
cause we do
Yes.
yes
Hydrogen and oxygen are similar because we both need them to survive hehehe
Water
We are humans and we need Oxygen to survive!
We can not live with out trees
fresh
food
Nose
Yes, and No. Cows can survive completely on grass as food, but it would need water too.