Organisms use the energy they produce to perform different functions. which function would polar bears and orange trees not use energy for?
homeostasis
bioluminescence
building cell parts
moving molecules

bioluminescence

Organisms use energy that they got from a plant or a prey to perform different functions like move, respond to stimuli, develop, cell repair and growth, homeostasis and other processes. Hence, orange trees and polar bears won't use energy on bioluminescence since they don't have need it. 

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.