What forms when a loop of a river becomes cut off from the rest of the stream?
a. a tributary
c. an oxbow lake
b. a stream
d. groundwater

When a loop of a river becomes cut from a river an oxbow lake is formed

Mexico has a host of environmental problems, including significant chemicalpollution  from factory discharges and waste dumping, but the main threat to itsbiodiversity  probably stems from  deforestation  and other natural habitat losses. forest habitat is lost for a number of reasons