Biomass pyramids show the amount of organic material at each trophic level; thus, they are the best type of ecological pyramid to use in order to model the flow of matter through an ecosystem. A numbers pyramid would not as accurately display this kind of information because a larger producer, such as a tree, which contains a great deal of matter, would be able to feed hundreds or thousands of small first-level consumers such as wood-eating insects.
XD
Metabolism
The metabolic processes in a cell determine its activity for conducting chemical reactions.
I believe it's lipids and carbohydrates, carbohydrates storing energy as glycogen.
They are called sea plankton. They are microscopic. One way you can see them is through a microscope. Good luck !