Answer:
eukaryotic, because our body cells have nucleus and membrane-bound organelles
Covalent bonds are the strongest chemical bonds. They are chemical bonds in which electrons are shared between atoms.
As trees takes in carbon dioxide and gives out oxygen, it is almost similar to how our lungs work in our respiratory system. As you know, lungs remove carbon dioxide from our body and transports oxygen in order for us to survive. So the tropical rainforests gives out oxygen for our survival needs, which is somewhat similar.
I hope you understand lawl