Not knowing what the choice of conditions is, I would say that it would be very damp conditions on land, and if the plant photosynthesises it would be good because of 'purer' sunlight. but if show what the choice of conditions are I can give you a more accurate answer (hopefully)
He found a nuclear structure (cells) in plants by looking through a microscope
B, because as energy is move up form the phyramid, energy is lost.
