Ascale you determine:
distance
direction
symbol representation
all of the above

all of the above

A scale is a tool which is marked by numerical representations of a certain object to measure a distinguishable distance between one certain area to the other. It also gives the direction or magnitude of the object being measured. 

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.