What is a particular job of a migrant worker and describe specific difficulties that are associated with that job.

A "migrant worker" is a person who either migrates within their home country or outside it to pursue work such as seasonal work. Migrant workers usually do not have an intention to stay permanently in the country or region in which they work. Migrant workers who work outside their home country may also be called  

Water flows along the east coast and across the western tropical pacific towards south america, while they both are directed towards that way,  el niño does not directly affect the southern flow of water along the coast.