I'd go with A, if I were you.
The first one is a.
2 is where water vapor is
During the transfer of energy from one tropic level to the next tropic level around 90% of the total energy is lost in the metabolic processes in the form of heat. Hence only about 10% of the total energy can only be transferred from one tropic level to the next tropic level.
Lipids don't store genetic informations so the answer is 2
they absorb liposoluble vitamins they offer insulation/cushioning they store energy
