Which ecosystem has the maximum biomass ?

The reservoir pool for gaseous cycles of matter is

If $20\ J$ of energy is trapped at producer level,then how much energy will be available topeacock as food in the following chain?

Plant $→$ Mice $→$ Snake $→$ Peacock

Primary succession is the development of communities on

The primary producers of the deep­sea hydrothermal vent ecosystem are

An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having